Before you c------ the road, you must look left and right

---Must we come back before five?--No,you___.You may come back before six if you likeA.mustn't B.needn't C.can't D.may not You won't lose before you have You can't watch TV before ------your homework.a finish b.to finish c.finishing You can't watch TV before ------your homework.a.finish b.to finish c.finish Don't listen to music______ you are studying.A.when B.before C.after I don't think you've heard of him before,____?A.have you B.do I C.haven't you D.don't I it wont be long ______ you regret what you have done.A,after B,before C,since D,then What can you do before you don't love me Before you buy some food ,you can t( )a little. Don't forget( )the door before you leave.A.close B.to close C.closeing D.closed i can't go with you tonight ( ) I have homework to do.A.before B.after C.because D.if you'd better come here----time tomorrow.don't keep us waiting.a.at b.on c.by d.before I can't go with you tonight______ I heva homework to do.A：before B：after C:because D：if Gut up early tomorrow,( )you can't get there before seven.A.so B.but C.and D.or Don't leave the room before you _____writing your compositionA.are finishing B.finish C.will finish D.finished You can't leave the workshop ____the machine is running.A.unless B.until C.while D.before -- __I come back before 11:00 --No ,you __.But you ___be back later than lunch time.A .Must ,needn't,can't B .Can ,can't ,may C.Need ,mustn't ,must D.May ,needn't ,can't为什么? How do you like Beijing?---oh,I_____such a beautiful city before. A.didn't visit B.haven't详细解释visited C.hadn't visited