19：He was told that it would be at least three more months____he could recover and return to work. A：when B：before C：since D：that ...

13：Only after his death ____ considered correct. A：was his theory B：his theory was C：did his theory D：had his theory ...

7：Where is my dictionary? I remember I put it here yesterday.—You____it in the wrong place. A：must put B：should have put C：might put D：might have put ...

1：This book will show you ____ can be used in other contexts. A：how you have observed B：how what you have observed C：that you have observed D：how that you have observed ...

20：For the____of your health, you should give up smoking. A：benefit B：profit C：result D：sake ...

14：After they___down in the village, they began to live a more peaceful life. A：arrived B：got C：stayed D：settled ...

8：Now that spring is here, you can____these fur coats till you need them again next winter. A：put over B：put away C：put off D：put down ...

21：She dislikes this skirt, ____? A：doesn’t she B：does she C：isn’t she D：is she ...

15：They were____because the thieves had stolen all their money. A：difficult B：in deep water C：absurd D：at wit's end ...

9：____of the noise, he shut all the windows of his room. A：Tire B：Tired C：Tiring D：Be tired ...