Every student is required to watch the teacher carefully before ___ the chemistr

题型：不详难度：来源：

Every student is required to watch the teacher carefully before ___ the chemistry experiment.

A．performing

B．taking

C．picking

D．having

答案

解析

本题考查动词辨析。句意为：在操作化学实验之前，每个学生必须认真观察教师的示范动作。perform表演；操作。

举一反三

We_____ the old scientist________ his contribution________ the country.

A．admire；for；to

B．admire；at；to

C．respect；on；for

D．respect；on；at

题型：不详难度：| 查看答案

— I feel really disappointed not to have got that job.
— Don"t worry. Maybe something better will ______.

A．go by

B．take on

C．turn up

D．fall down

题型：不详难度：| 查看答案

He is wearing sunglasses to ____ his eyes from the strong sunlight .

A．prevent

B．protect

C．stop

D．hold

题型：不详难度：| 查看答案

To be honest, every season of the year I do ___________watching tulips in Ma’an chi park.

A．pay attention to	B．play a trick on
C．do harm to	D．look forward to

题型：不详难度：| 查看答案

It suddenly __________ to the detective that the millionaire was probably murdered by his own daughter.

A．happened

B．occurred

C．thought

D．took place

题型：不详难度：| 查看答案