单项选择题

Adams hadn't a ______ what the speaker was talking about most of the time because the class was in chaos.

A．guess
B．thought
C．concept
D．clue
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单项选择题
______ computer is more essential to a modem business than typewriter.
A．The, the
B．/, /
C．A, the
D．The, a
单项选择题
A．viewedB．measuredC．gotD．found
A．viewed
B．measured
C．got
D．found
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