Is Mr. Green in the office—No, he ________ be in the office. Look, thelight in the office is off.

you’d better make sure _____ theexact time of the train before setting out

下午去学校遇见了Mr. Liang,你应该说： 。

I haven’t seen Sara since she was a little girl, and she has changed beyond ________.

I used to have words with my parents，but now we ______ fine．