Must we finishe the work before five?No,you ___.You can do it tomorrow.A.may not B.needn't为什么选A不选B?书中的答案是A,为什么呢?

Must we finishe the work before five?No,you ___.You can do it tomorrow.A.may not B.needn't为什么选A不选B?书中的答案是A,为什么呢? we must call the We must purify the we must o______ the rules we must keep the ( )on the road we must keep the( ) on the road We must shoot the arrow at the 将下列英语句子改写成一句话1.we arived at the cinema.Tfilm started.-----------------------------------------------2.John studied a little French.He went to paris.-------------------------------------------------------3.The old man finishe we must ()when the light is yellowAgoBcrossCwait we must have missed you along the We must be careful_____(cross) the road. We must be quiet in the library. Must we 【start】 the work at once 改错 We must keep the classroom cleanly. We must ___(keep) the classroom clean. We must find sb___(do) the job. We must be l------- to the school We must keep the window______(open).