改祁使句 you must be careful with your pronunciation说一下怎么改,翻译．

You must be careful to drive the car.改为同义句___ ___ ___to drive the car. You must be strong . you must be You must be hungry You must be joking You must be confident. You must be dreaming you must be careful .In Britain, you ____ be 18 if you want to drive a car. A.can B.must C.may.In Britain, you ____ be 18 if you want to drive a car. A.can B.must C.may D.might what you must konw if you go by car, you must be ___!(kid) You must be carful next You must be happy oh., you must be joking,救命 You Must Be Strong 歌词 You must certainly be happy i must be cull you you must be mistaken是什么意思?