单项选择题

The achievements of the greatest minds in science could never have been reached if it had not been for the patient and accurate work of hundreds of other people（）.

A．has it not been
B．if it had been
C．if hasn't been
D．had it not been

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单项选择题
According to some scientists, the computer will do much harm to people''s health as smoking and drugs do（）.

A．does much harm ... smoking
B．will do as much harm ... cigarettes
C．will be doing as much harm ... smoking
D．does as much harm ... cigarettes
单项选择题
The sales manager of the company suggested more money is to spent in a more effective advertising campaign and better packaging design（）.

A．is spending on
B．will be spent in
C．will be spent on
D．be spent on
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