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    A-B-B型(动词的过去式与过去分词相同) (1)词尾的“d 变为“t 或词尾是“n 加“t build-built-built lend-lent-lent send-sent-sent spend-spent-spent burn-burnt/burned-burnt/burned learn-learnt/learned-learnt/learned mean-meant-meant (2)把原形变为aught及ought的变化(如果原形有a则是aught.无a则是ought) buy-bought-bought bring-brought-brought think-thought-thought fight-fought-fought catch-caught-caught teach-taught-taught (3)eep变ept或过去式.过去分词含有/e/音的动词 keep-kept-kept sleep-slept-slept sweep-swept-swept leave-left-left say-said-said meet-met-met spell-spelt-spelt smell-smelt/smelled-smelt/smelled hold-held-held feel-felt-felt (4)其他 dig-dug-dug find-found-found stand-stood-stood understand-understood-understood get-got-got sit-sat-sat spoil-spoilt-spoilt have/has-had-had sell-sold-sold tell-told-told hang-hanged/hung-hanged/hung hear-heard-heard make-made-made pay-paid-paid lay-laid-laid lie-lied-lied lose-lost-lost shine-shone/shined-shone/shined win-won-won shoot-shot-shot 【查看更多】

     

    题目列表(包括答案和解析)

    下列与生物遗传有关的叙述，正确的是（  ）
    A．基因型为Aa的个体连续自交3代后，子代中隐性性状个体所占的比例为3/8
    B．已知黑斑蛇与黄斑蛇杂交，子一代既有黑斑蛇又有黄斑蛇，若再让F1黑斑蛇自由交配，F2中有黑斑蛇和黄斑蛇，可据此判断蛇斑的显隐性
    C．基因分离定律的实质表明，基因型为Bb的动物，在其精子形成过程中，基因B与B分开发生在初级精母细胞形成次级精母细胞时，B与b的分开发生在次级精母细胞形成精细胞时
    D．用豌豆进行遗传试验，杂交时须在开花前除去母本的雌蕊，人工授粉后应套袋

    查看答案和解析>>

    完型填空：阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。

    Monday morning is an important time at our school. All of the students go to the playground. We listen to music, and we  1 the national flag go up.

    　 Usually, one student gives a talk on Monday mornings. One Monday last year, a boy gave the talk. He was   2 and excited! When I saw him, I wanted to have a try, too.

    　 Can I really do it?

    　 Last week, our teacher said our class should give the talk. My teacher   3 me, “I know you want to have a try. Next Monday morning, I want you to give the talk. Go and write something down.  4 for it, I’m sure you’ll do well.”

    “Thank you.” I answered. It was such a great  5 for me! When I got home, I was excited. I wrote two pages for the talk. I read them again and again. When I read, I asked my parents  6 . I wanted to make my teacher happy.

    Finally Monday morning came. I began to feel  7 .

    When did I last give a talk to   8 many people? Never! This was my first time. Could I really  9 it? Maybe I couldn’t finish the talk.

    When I got to school, we all went out to the playground. I  10 in front of everyone. I opened my mouth, but I couldn’t say anything.

    “Take it easy,” I said to  11 . “Don’t be nervous. You can do it.”

    Just then, I looked down at everyone. I saw about 1,000 eyes. They were all looking at me ! I couldn’t  12  stand up.

    I took a look at their eyes more carefully. Their eyes seemed to say, “You can do it! Come on!   13 afraid, just talk!”

    I took a big breath. Then I began to talk. It wasn’t hard. It was easy.

    I don’t know  14 I finished my talk, but I tried my best to do it. I felt so good that day. I showed myself  15 everyone what I can do.

    1.                A．watch          B．see            C．notice    D．look at

     

    2.                A．surprised       B．proud          C．bored    D．careful

     

    3.                A．spoke          B．asked for        C．said to    D．showed

     

    4.                A．Look out        B．Come on        C．Take care D．Get ready

     

    5.                A．chance         B．news           C．time D．message

     

    6.                A．to do          B．to listen         C．to see    D．to play

     

    7.                A．excited         B．happy          C．nervous  D．surprised

     

    8.                A．after           B．such           C．before   D．so

     

    9.                A．do            B．speak          C．talk  D．take

     

    10.               A．sat            B．stood          C．jumped   D．ran

     

    11.               A．me            B．myself         C．my class   D．my parents

     

    12.               A．be able to       B．hardly          C．never D．even

     

    13.               A．Not be         B．Don’t         C．Don’t be D．Not

     

    14.               A．where         B．how           C．why  D．whether

     

    15.               A．with           B．at             C．to    D．for

     

     

    查看答案和解析>>

    任务型阅读。

    　　What is time?Is time the same all over the world?You may say that's an easy question．Wherever(无论哪里)you go,a minutes 60 seconds,an hour is 60 minutes,a day is 24 hours and so on．But in America,time is more than that．Americans see time as a valuable(贵重的)resource(资源)．(A)Maybe that's why they are fond of the expression(表达)“Time is money”．

    　　(B)Americans believe time is a limited(有限的)resource,so they all try hard to save it and use it in an efficient(有效的)way．No one can express the view(观点)better than the early American hero Benjamin Franklin,“Do you love life?Then do not waste(C),for that is the stuff(材料)fife is made of．”

    　　(D)To Americans,being on time is a way of showing respect(尊重)for others' time．If someone is(E)over ten minutes later than they have planned(计划),he has to say sorry or tell the reason．People who are running late(迟到)often call ahead(提前)to let others know of the delay(延期)．The lifestyles(生活方式)of Americans show how much people respect the time of others．When people plan an event,they often set(定)the time several days or weeks before it．Once the time is fixed(确定),it is hardly changed,unless(除非)the situation is critical(紧急的)．If people want to come to your house for a friendly visit,they usually ring you up to make sure(确信)you have time and are at home．Besides,(F)大部分美国人不愿意晚上十点以后打电话,without anything important．

    　　To outsiders(局外人),Americans seem tied to(受……束缚)the clock,while they themselves like plans to be fixed and unchangeable．

    　　Time is one of life's most precious(珍贵的)gifts．And unwrapping(打开)is great fun．

    (1)

    (A)句中are fond of的意思是：“________”。

    [　　]

    A．

    讨厌

    B．

    喜欢

    C．

    不充分利用

    D．

    懂得

    (2)

    将(B)句翻译成汉语：________。

    (3)

    在(C)处填上一个单词，使句意完整：________。

    (4)

    将(D)句翻译成汉语：________。

    (5)

    写出(E)处“over”的同义短语：________。

    (6)

    将(F)处的汉语翻译成英语：________．

    查看答案和解析>>

    完型填空：阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。
    Monday morning is an important time at our school. All of the students go to the playground. We listen to music, and we  1 the national flag go up.
    　 Usually, one student gives a talk on Monday mornings. One Monday last year, a boy gave the talk. He was   2 and excited! When I saw him, I wanted to have a try, too.
    　 Can I really do it?
    　 Last week, our teacher said our class should give the talk. My teacher   3 me, “I know you want to have a try. Next Monday morning, I want you to give the talk. Go and write something down.  4 for it, I’m sure you’ll do well.”
    “Thank you.” I answered. It was such a great  5 for me! When I got home, I was excited. I wrote two pages for the talk. I read them again and again. When I read, I asked my parents  6 . I wanted to make my teacher happy.
    Finally Monday morning came. I began to feel  7 .
    When did I last give a talk to   8 many people? Never! This was my first time. Could I really  9 it? Maybe I couldn’t finish the talk.
    When I got to school, we all went out to the playground. I  10 in front of everyone. I opened my mouth, but I couldn’t say anything.
    “Take it easy,” I said to  11 . “Don’t be nervous. You can do it.”
    Just then, I looked down at everyone. I saw about 1,000 eyes. They were all looking at me ! I couldn’t  12  stand up.
    I took a look at their eyes more carefully. Their eyes seemed to say, “You can do it! Come on!   13 afraid, just talk!”
    I took a big breath. Then I began to talk. It wasn’t hard. It was easy.
    I don’t know  14 I finished my talk, but I tried my best to do it. I felt so good that day. I showed myself  15 everyone what I can do.

    【小题1】
    A．watchB．seeC．noticeD．look at
    【小题2】
    A．surprisedB．proudC．boredD．careful
    【小题3】
    A．spokeB．asked forC．said toD．showed
    【小题4】
    A．Look outB．Come onC．Take careD．Get ready
    【小题5】
    A．chanceB．newsC．time D．message
    【小题6】
    A．to doB．to listenC．to seeD．to play
    【小题7】
    A．excitedB．happyC．nervousD．surprised
    【小题8】
    A．afterB．suchC．beforeD．so
    【小题9】
    A．doB．speakC．talkD．take
    【小题10】
    A．satB．stoodC．jumpedD．ran
    【小题11】
    A．meB．myselfC．my classD．my parents
    【小题12】
    A．be able toB．hardlyC．neverD．even
    【小题13】
    A．Not beB．Don’t C．Don’t beD．Not
    【小题14】
    A．whereB．howC．whyD．whether
    【小题15】
    A．withB．atC．toD．for

    查看答案和解析>>

    完型填空：阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。
    Monday morning is an important time at our school. All of the students go to the playground. We listen to music, and we  1 the national flag go up.
    　 Usually, one student gives a talk on Monday mornings. One Monday last year, a boy gave the talk. He was   2 and excited! When I saw him, I wanted to have a try, too.
    　 Can I really do it?
    　 Last week, our teacher said our class should give the talk. My teacher   3 me, “I know you want to have a try. Next Monday morning, I want you to give the talk. Go and write something down.  4 for it, I’m sure you’ll do well.”
    “Thank you.” I answered. It was such a great  5 for me! When I got home, I was excited. I wrote two pages for the talk. I read them again and again. When I read, I asked my parents  6 . I wanted to make my teacher happy.
    Finally Monday morning came. I began to feel  7 .
    When did I last give a talk to   8 many people? Never! This was my first time. Could I really  9 it? Maybe I couldn’t finish the talk.
    When I got to school, we all went out to the playground. I  10 in front of everyone. I opened my mouth, but I couldn’t say anything.
    “Take it easy,” I said to  11 . “Don’t be nervous. You can do it.”
    Just then, I looked down at everyone. I saw about 1,000 eyes. They were all looking at me ! I couldn’t  12  stand up.
    I took a look at their eyes more carefully. Their eyes seemed to say, “You can do it! Come on!   13 afraid, just talk!”
    I took a big breath. Then I began to talk. It wasn’t hard. It was easy.
    I don’t know  14 I finished my talk, but I tried my best to do it. I felt so good that day. I showed myself  15 everyone what I can do.
    小题1:
    A．watchB．seeC．noticeD．look at
    小题2:
    A．surprisedB．proudC．boredD．careful
    小题3:
    A．spokeB．asked forC．said toD．showed
    小题4:
    A．Look outB．Come onC．Take careD．Get ready
    小题5:
    A．chanceB．newsC．time D．message
    小题6:
    A．to doB．to listenC．to seeD．to play
    小题7:
    A．excitedB．happyC．nervousD．surprised
    小题8:
    A．afterB．suchC．beforeD．so
    小题9:
    A．doB．speakC．talkD．take
    小题10:
    A．satB．stoodC．jumpedD．ran
    小题11:
    A．meB．myselfC．my classD．my parents
    小题12:
    A．be able toB．hardlyC．neverD．even
    小题13:
    A．Not beB．Don’t C．Don’t beD．Not
    小题14:
    A．whereB．howC．whyD．whether
    小题15:
    A．withB．atC．toD．for

    查看答案和解析>>


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