专四

单选题 It's time you __________ the literature review．

A．began
B．shall begin
C．begin
D．are beginning

参考答案：A进入在线模考
A。你应该开始写文献综述了。二等查固定句式。it's(high)time后接从句时，从句谓语动词要用过去式或should+动词原形，should不可省略，故选A。

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1 The qualities of my hometown, __________ on me as a boy, had a profound effect on the philosophy that directed my career．

A．having impressed
B．impressed
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2 Talking about that is useless, __________ is familiar to me．

A．which fact
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C．fact
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3 Neptune is about thirty times as far from the Sun __________

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