3.The medicine ____　 _______　 ________(在检测).

(21)2. I rubbed the window with a __________(布料). 我用一块布擦窗子。 3. __________(布料) is sold by the yard.布是按码卖的。

3. Some scientists __________(做实验)on animals.有些科学家用动物做试验。

(19)3. _____　 _________(提前)

(20)2. ____________(举行考试) /____________(参加考试)

3. _________　 _____(卷入) the robbing, he was charged.

(18)1. ______　 / __________　 /_________ / _______ an experiment(进行实验)

2.He______　 __________　 ______(忙于)writing his second book.

4.He ______　 ____　 _________(得到好处) of fifty thousand US dollars on his house.

(16)1. How should we ________(投入)ourselves in school life?我们应该怎样投入学校生活？

5. I must ___________(承认)that it's more difficult than I thought it would be.我必须承认，这比我想象的要困难得多。

(15)1. There is very little ___________(利润) in selling newspapers at present. 现在卖报纸利润很少。 (受益)by my mistakes and avoid them yourself.　你可以从我的错误中得到教训，避免犯同样错误。 3. It will ___________(使得到好处) you nothing to do that.你做那件事没有什么好处。

4. He _____　 ________　 ____(送进)to the hospital suffering from burns.他由于烧伤，被送入医院治疗。

7. The ___________(收费) for admission is $5.

(14)3. ___________(入场) (to the club) is restricted to members only.只准会员进入(俱乐部).

6.The battery needs ____　 ________　 _____(充电).

5.Tom is ____　 ________　 _____(管理) the job.