We must ____(switch on/switch off)the lights before we leave the classroom.

We must ____(switch on/switch off)the lights before we leave the classroom. We must keep ____(health) we must ____ friendly____ visitors we must not only think ____(we) What rules ____ we ____ (must obey)in the classroom Must we cut down the trees? No.we ____. 15 We must not touch this switch under any ______.A.situation B.case C.circumstances D.occasion选择哪个 we must prepare our guest a room同义句转换.we must ____ a room____ ____ ____. we must speak english as much as we can的同义句 we must speak english____ ___ ____ ____ We must finish our homework(反意疑问句）We must finish our homework,____ _______? we must keep happy同义句转换we must keep happy___is____ ____ keep happy We must take ____(act) before it is too late we must plant more trees to ____ our planet greener. We must do our ____ to help them 填什么 We must do everything possible to keep them ____(safety) 填空,we must do aye ____ {exercise} every day We must _____many many ____ ______every day (做数学练习) We must speak to the old men politely.(改为同义句） the old men must ____ ____ ____ politelyWe must speak to the old men politely.(改为同义句）the old men must ____ ____ ____ politely