we should keep the b_______of the nature 横线上应该填什么?

We should keep the nice room clean It is important that we ( )the news secret.A:must keep B:would keep C:should keep D:kept应该选哪个,为什么 We should try to keep the（平衡）of nature we should keep the water clean(改为一般疑问句） We should keep the water clean 的汉语意思是? we should keep the air ___ ___ ___ (清新) should we diet in the order to keep fit we should keep the river clean.(一般疑问句） .We should keep off the grass.（改为同义句） We should keep the baby ___(save)from danger. We should keep quiet in the reading room .We should keep quiet in the reading room .（改同义句） we should keep( )in the reading-roomA.quiet B.quietly C.quite D.quickly应该选A吧, we should keep the young boys______.A.from somke B.that finish.C.to finish D.finishing 选哪个?原 You should keep the Should we dietto keep fit 六年级划线部分提问We should keep quiet in the library划线部分是keep quiet We should keep the environment clean.We must not pump s___ into the river we should keep our classroom ( ) A.clewe should keep our classroom ( ) A.cleaning B.cleaned C.clean