Stop the traffic,if there ___an accident.A will be B.is .B .请问 A为什么不对?我知道if 条件句“主将从现”,可是主句也没用将来时啊.怎么能说的通?

The traffic light is red now.we must stop If the traffic light is red,I must stop.I have to____when it is yellow.I can ___when it is green.横线上要填什么啊? You must stop if the traffic light＿＿＿（be）red. DonYou must stop if the traffic light＿＿＿（be）red.Don't go out if you＿＿＿＿（not finish）you homework. Stop the traffic,if there ___an accident.A will be B.is .B .请问 A为什么不对?我知道if 条件句“主将从现”,可是主句也没用将来时啊.怎么能说的通? Where is the policeman He ——（stop）the traffic on the highway. If在下列列句中的用法If you drive too fast,you may have an accidentYou must stop if the traffic is red以上两句话中“If"译为——,它引导的是——从句.If条件状语从句表示——.If引导的是——句,用——时 The traffic had to stop bacause of the heavy snow 改复合句 you___ stop when the traffic light is red.A.can B.may C.must D.might () the traffic lights turn red ,you must stop.A.when B.which C.what D.where You should stop when the traffic lights are red.改为祈使句 A car does not stop on the traffic lights 求教,错哪了?句意是什么? When the traffic l___ are red,you must stop and can't drive on. stop ___ the traffic light A.in B.on C.to D.at The red traffic light ___that you must stop your car. A.means. B.sings. C.speak we will go home if the rain (stop) He will go home if it( ) (stop) raining the afternoon 译句：he must stop and either look at the traffic lights or look both ways down the street.he must stop and either look at the traffic lights or look both ways down the street. I like(light) organe clothes适当形式The driver failed to stop at the traffic(light）