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21．end up最后落得……的結局／下場

　 end(up)with以……結束

20．begin at／start with／begin with以……開始

　 Today we shall begin at page 40．

　 Autumn begins／starts with August．

　 to begin with首先

19．stand for代表

　 What does“U．S．”stand for7

　 stand by支持

　 No matter what happens．I’11 stand by you．

　 stand by = support／take part with／take the side of／be in favour(support)of

18．settle down定居

　 After years of traveling, Mr．Li decided to settle down．

17．used to do sth．過去常常

　 There used to be a brook in front of my house when 1 was a little child．

16．devote…to sth．／sb．獻身于；致力于

　 After he graduated from university，he devoted himself to the teaching work in the countryside．

15．quarrel with sb．about sth．為……爭吵

　 She often quarrels with her husband about housework．

14．struggle against與……作斗爭

　 We are struggling against pollution．　　 、

13．work out算出；計算出

　 The maths problem is too difficult for me to work out．

12．wear out(使)筋疲力盡

　 I was worn out from the long walk．