I am always eager to do experiments, especially chemistry ones. It's   _26_  to work with test tubes and beakers（烧杯） , even though sometimes my efforts end in__27___. Experiments were fun for me  __28  a recent accident.
The   29  happened when I was heating a big test tube with an alcohol burner（酒精灯） , chatting to my partner while waiting for__30____ changes. All of a sudden, the tube cracked. Even though I jumped from my seat when I heard the crack, the hair on my forehead was __31____ as I was leaning too close to the test tube.
  __32___ I had no time to be sad about my hair: the liquid in the test tube poured onto the table and caught fire. I'd never  33 _ anything so bad! My___34___went blank （空白）for a moment. Then I quickly covered the fire with a damp cloth to__35____.
The teacher told me that the test tube broke in half at the bottom because we didn't dry it properly before __36___ it.
We calmed down and did the experiment, again. But our hearts were still __37____ rapidly even after we walked out of the lab.
But my bad __38___ didn't end there! Since all __39     was focused on the flames while we were in the lab, I didn't see the liquid falling onto my trousers.
During the following class, I felt a __40___ in my leg. Soon it became more and more painful and I touched the area with my fingers,   _41_  to make things better. But to my great    42___ , the material of my trousers turned into powder! “Vitrio（硫酸）! ! !”The terrible word came into my mind. I rushed out right away to wash and examine my poor skin.  _43_  , it was not a serious injury.
After changing my __44____I sat down and told myself: danger is no joke! It's very important to have a serious___45___ in chemistry class. Doing scientific experiments as a learner is no laughing matter.

I am always eager to do experiments, especially chemistry ones. It's   21   to work with test tubes and beakers , even though sometimes my efforts end in failure. Experiments were fun for me   22   a recent accident.

     The accident happened when I was heating a big test tube with an alcohol burner , chatting to my partner. All of a sudden, the tube cracked. Even though I jumped from my seat when I heard the crack, the hair on my forehead was burnt as I was leaning too close to the test tube.

        23   I had no time to be sad about my hair: the liquid in the test tube poured onto the table and caught fire. I'd never  24   anything so bad! My mind went blank for a moment. Then I quickly covered the fire with a damp cloth to put it out.

     The teacher told me that the test tube broke in half at the bottom because we didn't dry it properly before 25  it.

      We calmed down and did the experiment, again. But our hearts were still   26   rapidly even after we walked out of the lab.

      But my bad luck didn't end there! Since all our   27   was focused on the flames while we were in the lab, I didn't see the liquid falling onto my trousers.

      During the following class, I felt a pain in my leg. Soon it became more and m6re painful and I touched the area with my fingers,   28   to make things better. But to my great   29  , the material of my trousers turned into powder! "Vitriol ! ! ! The terrible word came into my mind. I rushed out right away to wash and examine my poor skin.   30  , it was not a serious injury.

      After changing my trousers I thought it's very important to have a serious attitude in chemistry class. Doing scientific experiments as a learner is no laughing matter.

21. A. exciting    B. moving                     C. dangerous       D. difficult

22. A. but                B. except        C. besides               D. until

23. A. Because            B. Instead               C. But                    D. Or

24. A. felt                B. heard                       C. experienced     D. imagined

25. A. boiling        B. holding                 C. heating                 D. cooking

26. A. striking              B. beating                 C. knocking        D. hitting

27. A. effort               B. sense           C. attention          D. spirit

28. A. failing               B  imanaging             C. trying           D. planning

29. A. disappointment  B. joy              C. surprise       D. comfort

30. A. Luckily      B. Obviously               C. Unexpectedly           D. Generally

 – Excuse me, sir. But nobody _____ smoke here in the lift!

   -- Sorry! I didn’t see the sign.

A. will        B. shall       C. can      D. may

I am always eager to do experiments, especially chemistry ones. It's   _26_  to work with test tubes and beakers（烧杯） , even though sometimes my efforts end in__27___. Experiments were fun for me  __28  a recent accident.

The   29  happened when I was heating a big test tube with an alcohol burner（酒精灯） , chatting to my partner while waiting for__30____ changes. All of a sudden, the tube cracked. Even though I jumped from my seat when I heard the crack, the hair on my forehead was __31____ as I was leaning too close to the test tube.

  __32___ I had no time to be sad about my hair: the liquid in the test tube poured onto the table and caught fire. I'd never  33 _ anything so bad! My___34___went blank （空白）for a moment. Then I quickly covered the fire with a damp cloth to__35____.

The teacher told me that the test tube broke in half at the bottom because we didn't dry it properly before __36___ it.

We calmed down and did the experiment, again. But our hearts were still __37____ rapidly even after we walked out of the lab.

But my bad __38___ didn't end there! Since all __39     was focused on the flames while we were in the lab, I didn't see the liquid falling onto my trousers.

During the following class, I felt a __40___ in my leg. Soon it became more and more painful and I touched the area with my fingers,   _41_  to make things better. But to my great    42___ , the material of my trousers turned into powder! “Vitrio（硫酸）! ! !”The terrible word came into my mind. I rushed out right away to wash and examine my poor skin.  _43_  , it was not a serious injury.

After changing my __44____I sat down and told myself: danger is no joke! It's very important to have a serious___45___ in chemistry class. Doing scientific experiments as a learner is no laughing matter.

阅读下列各小题，根据括号内的汉语提示，用句末括号内的英语单词完成句子，并将答案写在答题卡上的相应题号后。

1.With the fog-haze weather appearing frequently, nowadays many a citizen _____________________ live where the air is fresher. (long)

由于雾霾天气频繁出现，现在很多市民正渴望能生活在空气更清新的地方。

2.Hardly ____________________ amazed when he received the admission notice from Beijing University because he thought it was the result of his efforts. ( feel)

当他收到北京大学的录取通知书时，他并没感觉意外，因为他认为那是他努力所得。

3.But for the fact that I ___________________ in that accident, without doubt, I wouldn’t be alive today. (fasten)

在那次事故中，要不是我系了安全带的话，毫无疑问我是活不到现在的。

4.The sports meet, originally _________________last Friday, was finally delayed because of the bad weather. (due)

原本定于上周五举行的运动会最终由于恶劣的天气而推迟。

5.At first, the way, ______________________ pictures, was laughed at by others, but it didn’t discourage him. (draw)

起初，他绘画的方式遭到他人嘲笑，但那并没有使他气馁。

6.At the foot of the mountain _____________, where people lived a peaceful life. (lie)

 在那个山脚下有个村庄，那里的人们过着宁静的生活。

7.Several deaths from drowning _________________ in the past few days, swimming in that river is said to have been banned. （happen）

   近几天发生了几起溺水身亡的事件，据说在那条河里游泳已被禁止了。

8.It never occurred to me ____________________________a new life in a strange city. ( tough)

我完全没想到在一个陌生的城市开始一种新的生活有多么的难。

9.Because the wireless network is widely applied , the users surfing the Internet by cellphones is about ______________________________ those by computers. (as)

由于无线网络的广泛应用，现在使用手机上网的用户大约是使用电脑上网的用户的两倍一样多。

10.I am afraid that I didn’t see the speed limit just now, officer. I _________________(dream )

警官，恐怕我刚才没看到时速标志，我肯定是正在开小差。