At the computer operation test, one is supposed to stay at his own machine, keep his eyes on his screen, ______ to anyone.
A. and not to speak B. but could not speak C. instead of speaking D. or rather speak
A
Tom was so wild about computer games that he would stay online for ten hours ______every day.
A.in the end B.in particular C.on end D.on purpose
C
_____ is known to everybody, the moon travels round the earth once every month.
A. It B. As C. That D. What
B
It was a great _____ for him to be pleasant to people he didn't like.
A. attempt B. trouble C. power D. effort
D
The secretary and principal ________ at the meeting now.
A.are speaking B.is speaking
C.were making a speech D.have a speech
B
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