3.①He _______　 last month.

②_______________________________________.这个房间里请勿吸烟。

2.①-They are quiet, aren’t they?

-Yes. They _________________________.(习惯于吃饭时不讲话)

②_______________(习惯了攀登) the steep mountains, he had no difficulty reaching the top.

1.①I wanted to go to college, but I didn’t want to _____________.(应对压力)

②The English teacher __________________________________.

英语老师强调了朗读的重要性。

③An army spokesman ________(着重指出) that all the soldiers had been ordered　　　　 (issue) clear warnings before firing any shots .

23. He knew ________ ________ ________ more than me.　 他懂得比我多得多。

别人或迈进或叩开大学的校门，纵使我不能，我也要“咬”开！

22. Electric trains have now________ ________ ________ ________ steam ones.现在电气化火车已经取代了蒸汽火车。

21. You should ________ your attention ________ your work. 你应该把注意力放到工作上。

4. The dog is his master's ___________(影子).这条狗和主人形影不离。

3.Dark clouds are a ________(迹象) of rain or snow.乌云是雨或雪将至的预兆。 4. She ________(签字) her name to the document.她在文件上签了名。 5. The football team has ________(签约) two new players.该足球队已签约聘用了两名新队员。

(21)1. He walked along in the________(暗处) hoping no one would recognize him.他走在暗处，希望没有人认出他来。 2. He felt he was being ________(跟踪), but he couldn't see anyone behind him.他感觉到有人在跟踪他，但他看不见身后的人。

2. He only bought the yacht as a status ________(象征) -----he hates sailing.他买游艇只是为了显示身分--其实他根本不喜欢玩游艇.

3. He ______________(提交) a motion to the Congress.他向国会提交了一份议案。

(20)1.The dove is the ________(象征) of peace.鸽子是和平的象征。