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
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.
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
单项选择题 If Tim keeps working hard like this, he'll()sooner or later.
