we must wear_______(save)belt in a car

we must wear_______(save)belt in a car We must 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 study them.是“we must study them. we must keep our classroom( ). we must ( ) our school nuiforms ( we must start tomorrow morning. We must ___(be) careful. So We must Study hard we must do more英译汉