but they must wait before the green light is s_____ if they want to turn left.

they () wait.A.will B.may C.must D.can but they must wait before the green light is s_____ if they want to turn left. there was nothing they could decide but ( ) A wait B to wait they must wait until the lights are green求翻译 But they must look after themselves. Are they coming by train?-they should,but they __not.they like driving their car.A must B can C need D may harry up.He___for us at the station.A must wait B must be waiting C should wait drivers must't drive after drinking alcohol,( )they will be in trouble.A.but.B.and.C.or.d.so They must wait until the red light changes to green 是什么意思 1 He has no choice but _to see him A to go B go2 There was noing they could do but _for a mechanic to arriveA to wait B wait 语法上讲是 nothing.but 和no +n+but 其后要用不定式第二提为什么选B呢,答案说有时可省略,什么时候 Hurry up,Mary _______for us at the station.A.must be waiting B.must wait --Comeputers are so useful.They can do almost everything!--Yes.But they ___ what to doA must be told B has to be known They stood___and ___for the bus.A.there,wait B.to ,wait C.there,waited D.here,to wait You ()leave,do you?But they must leave now.A.needn't to B.don't need to C.both A and B.为什么选择B They could do nothing but ___ (wait) at home什么时态 you should __ the customers tea before mwals.But they say they can‘t wait to eat!A provide B afford C lead D serveyou should __ the customers tea before meals ---You did not wait for Mr.Black last night,did you?---Yes,but we __ .he did not return home at allA.must not B.need not C.would not D.should not have --____I ask a question?--Sure.But you must wait a minute.A.May B.Shall选哪个?为什么不能用shall?shall要在什么情况下才能用?