题目内容

What is e-mail？

A live conversation with an expert.
B. A means of communication.
C. A long-distance call service.
D. A mail delivery system.

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A．withB．byC．withoutD．from

A. with
B. by
C. without
D. from

A．askB．doubtC．careD．wonder

A. ask
B. doubt
C. care
D. wonder

The second book was ______ by August, but several months later, its publication was still

A. completed
B. to complete
C. to have completed
D. to have been completed

A．afterB．whenC．beforeD．as

A. after
B. when
C. before
D. as