（ ）4.We must _____the factories from producing harmful gases.A.protect B.provide C.stop D.destro

We must （）a student ,we must study hard we must protect ourselves （w） We must finish our homework(反意疑问句）We must finish our homework,____ _______? we must keep animals from danger.（保持原句意思） we must ------ animals ------ danger. We must value what we We must ( )(work)hard. we must call the We must help them? we must help it why we must sleep We must learn it we must find a We must purify the ）We must keep quiet.=________quietWe must keep quiet.=________quiet(横线填一个单词) we must（）our school bags to school怎么填 We must love our family(改为一般疑问句） we must keep ourselves safe （ ）danger.中填什么