题目内容

I’mafraidyou’llhavetowaitawhileforthemeetingtobegin.()themeantime,youmaygooveryourspeechagain.

A. Down
B. Up
C. To
D. In

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The development of the world’s e_______ will bring about many new problems.

A. conomy
B. conomic
C. conomics
D. conemy

Sometimes, e-mail can be the most _________ form of communication, for messages can be exchanged within a very short time.

A. effective
B. urge
C. disturb
D. identify

We have invited an expert ______ this area to give us a speech.

A. in
B. to
C. onto
D. aside

If you are too busy, just call me to help ________.

A. out
B. aside
C. about
D. apart