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问题

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

A:performing
B:taking
C:picking
D:having
正确答案是:
同类题型

He telephoned me________he arrived in the city[ ]

o you want the radio so much– _________ to the news, sir.

It’s nearly four years since I worked in that farm. I ________ a band with other fellows.

I don’t know how to be good with my family problem. Could you give me some ______ .

They decided to chase the cow away _____ it did more damage

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