单项选择题

Even in small companies,computers are a(n)______tool．

A．natural
B．essential
C．careful
D．impossible
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单项选择题
______ the journey is not decided yet.
A) Whether will they have

B) Whether they will have
C) If will they have

D) If they will have
单项选择题
As a matter of fact, they would rather leave for China than______ in America.
A) stay

B) staying
C) stayed

D) to stay
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