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___ he came to study in the university, he has made much progress in the study of English.

A. While               B. When             C. Since             D. After

You are certainly right,____ others may say.                   A. what  B. whatever   C. that    D. as

Let’s walk over——the sun．

A．in B．to C．under D．by

He spoke loudly ____ the audience could hear him clearly.

A. so                        B. that             C. so that          D. in order to

____ to New York, her father has not heard from her.

A. Because she went B. After she went C. When she went  D. Since she went

The doctor will be free ____.

A. 10 minutes later                                      B. after ten minutes

C. in ten minutes                                    D. 10 minutes after

Did you have any trouble ____ the post office?

A. to have found      B. with finding       C. to find        D. in finding

____ the sun, nothing would grow.

A. For                        B.With                    C. Under           D. Without

It happened ____ the Long March.          

A. during           B.in              C.at             D.for

The classroom is big enough         , but we’ll have to move if we have more students.

A．for the moment          B．on the moment C．in a moment      D．for a moment