at the door before you enter my room, please.A．KnockB．KnockingC．KnockedD．To knock 题目和参考答案——青夏教育精英家教网—

题目内容

________ at the door before you enter my room, please.

A．Knock

B．Knocking

C．Knocked

D．To knock

考查祈使句。祈使句句首应该使用动词原形。

练习册系列答案

Cindy, to be here at 8 o’clock.

For more information on how to apply for scholarship, ______ our Web site at www.edu/scholarship.

__________ everything a shot because you never know what is going to change your life.

___________ and I’ll get the work finished.

A．Have one more hour	B．One more hour
C．Given one more hour	D．If I have one more hour

Mary, here – everybody else, stay where you are.

Mary，______ here--everybody else，stay where you are.

---Mrs. Smith, please teach me how to draw on the computer today.
---Oh, no. ____________. You have to get familiar with the keyboard first.

A．Think twice before you do	B．All things are difficult before they are easy
C．Learn to walk before you run	D．Don’t count your chickens before they are hatched

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