选择正确的情态动词填空

It's too dangerous. You________ (should, shouldn't) be more careful from now on.

选择正确的情态动词填空

Excuse me！ I don't have a pen？________ (can, should) I use yours？

单词归类．

A．请把下列单词按照不同的类别填写在相应的横线上．

arm, rest, thirsty, honey, back, cold, should, dentist, illness, ear, eye, balance, foot, Huangqi, beef, headache, herb, lamb, tofu, leg, bean, neck, fever, stomach, energy, throat, might, sore, Dangshen

1．食品________________________________

2．身体部位：________________________________

3．疾病：________________________________

4．形容词：________________________________

5．药剂：________________________________

6．情态动词：________________________________

7．职业：________________________________

8．其他：________________________________

B．除了上面列出的词汇以外，你还知道哪些呢？请补充．(每一类相应补充一个)

________ ________ ________ ________ ________ ________ ________ ________

为研究细胞分裂素的生理作用，研究者将菜豆幼苗制成的插条插入蒸馏水中(图1).对插条的处理方法及结粱见图2.

（1）细胞分裂素足一种植物激素。它是由植物体的特定部位＿＿＿＿＿＿＿，再被运输到作用部位，对生长发育起＿＿＿＿＿＿＿＿作用的＿＿＿＿＿＿＿＿＿＿有机物。
（2）制备插条时除去根系和幼芽的主要目的是＿＿＿＿＿＿＿＿：插条插在蒸馏水中而不是营养液中培养的原因是＿＿＿＿＿＿＿＿＿＿＿·
（3）从图2中可知，对插条进行的实验处理包括＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿。
（4）在实验I中，对A叶进行实验处理，导致B叶＿＿＿＿＿＿＿＿＿＿.该实验的对照处理是＿＿＿＿＿＿＿＿。
（5）实验、III、IV的结果表明，B叶的生长与A叶的关系是: ＿＿＿＿＿＿＿＿＿＿＿。
（6）研究者推测“细胞分裂素能够引起营养物质向细胞分裂素所在部位运输”。为证明此推侧，用图I所示插条去除B叶后进行实验，实验组应选择的操作最少包括＿＿＿＿＿＿
(填选项前的符号).
a．用细胞分裂素溶液涂抹A1叶
b．用细胞分裂素溶液涂抹A２叶
c．用¹⁴C-淀粉溶液涂抹A1叶
d. 用¹⁴C-淀粉溶液涂抹A2叶
e. 用¹⁴C-氨基酸溶液涂抹A2叶
f. 用¹⁴C-细胞分裂素溶液涂抹A2叶
g. 检测A1叶的放肘性强度

用括号内所给单词的适当形式填空,必要时可加助动词或情态动词。

Waste can be seen everywhere in our school. Some students ask for more food than they can eat and others often forget  1 (turn)off the lights when they leave the classroom. They say they can afford these things. But I  2 (not agree)with them.Waste can bring a lot of problems. Although China is rich in some resources (资源), we’re short of others, for example, fresh water(淡水). It  3 (report) that we will have no coal(煤) or oil to use in 100 years. So if we go on  4 (waste) our resources,what can we use in the future? Think about it. I think we should

say to the students who waste things every day. Everybody  5 (stop) wasting as soon as possible.

In our everyday life, we can do many things  6 (prevent) waste from happening, turn off the water taps(龙头) when we 7 (finish) washing, turn off the lights when we leave the classroom, try not to order more food than we need, and so on. Little by little, everything will be changed. Waste can be stopped one day if we do our best.