单项选择题

It is necessary that he______.

A．gives up trying
B．give up trying
C．would give up trying
D．is going to give up trying
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单项选择题
Next September, Ted and Marie______ for 20 years.
A．are married
B．have been married
C．will have been married
D．will marry
单项选择题
The boy wanted to ride his bicycle in the street, but his mother told him______.
A．not to
B．not to do
C．not do it
D．do not
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