We must [ ] at the door before we do into the teacher's office.根据句意填空

We must shoot the arrow at the Must we 【start】 the work at once we must keep quiet at the library错误在那里 we must _(派；寄)for the doctor at once We must c_____ to school at 7.00 in the morning. We must make the earth a happy home____both human beings and animalsA.for B.with C.by D.at The twin___________work hard at lessons.We must help them.A / B don't C aren't D is like选择 When the fire d----- is high,we must be careful.We must not have c--- in the countryside.We must put our rubbish bin.At home ,we must not cook w--- an adult,We must not play near a fire ,It's everyone‘s job not to s----- a fire.首字母填空 The driver is hurt.We must spend him to the hospital____.A.on time B.at frist C.at last D.right aw Must we go to see a doctor at once when we have the flu?Yes,we must.是什么 we must call the We must purify the We must look ______ left,then _____right before we cross the road.1./,/2.at,/3./,at4.at,at We must be back at the school by seven o,clock .We _______be late at school,we must clean the classroom 改为同义句 at school,we（ ）（ ）clean the classroom we must make the earth a happy home___both human beings and animals.A for B with C by D at选哪个?为什么?请翻译一下! all__you must do now is to lend us ten dollars,we haven't brought any money with us at the momentA.that B what C which D things I think we must first _______how to get there and the cost A,look for B,find C,find out D,look at