题目内容

Experiments in the photography of moving objects______in both the United States and Europe

A. were conducting
B. have been conducting
C. had been conducted
D. had conducted

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You didn't know what the teacher said in the classroom? You ______ asleep.

A. must be
B. must have been
C. should be
D. should have been

You have to read the manual carefully first, otherwise you______have difficulty using the

A. should
B. will
C. might
D. may

The passage tells us how to______.

A. make a sales presentation
B. make friends with a prospect
C. present ourselves to a prospect
D. make an appointment with a prospect

When you enter the prospect’s office you must______.

A. walk straight up to him
B. greet him as warmly as possible
C. draw his attention to what you have to say
D. be ready to answer whatever questions he may have

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