单项选择题
As it turned out to be a problem of no importance, we()so much time look- ing into it.
A．needn't spend
B．didn't have to spend
C．oughtn't to spend
D．needn't have spent
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单项选择题
—Can I help you —I'd like to buy a present for my father's birthday,()at a proper price, but of great use.
A．that
B．one
C．anyone
D．everything -
单项选择题
—Dear me! Ive been in America for a month. —()you are settled, why dont you take up some serious study
A．If
B．Now that
C．When
D．Even if -
单项选择题
If Tim keeps working hard like this, he'll()sooner or later.
A．break down
B．give up
C．get down
D．hold on
