单项选择题

The manager of the company insisted that all the staff members ______ the new safety rules.

A．would observe
B．observe
C．observed
D．will observe
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单项选择题
If you can' t put your PC ______ good use, sell it to those who really need it.
A．into
B．of
C．to
D．with
单项选择题
______ he was an old customer, the boss allowed 5% discount off the prices of the goods.
A．Gave
B．To give that
C．Given that
D．Giving that
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