We must keep the air clean and never _________ (pollute,poll
We must keep the air clean and never _________ (pollute,poll
we must keep sea water clean and stop___it(pollute)
英语翻译原文:we must keep the air clean for the eagle to fly.we mu
We must keep the air in the room clean.(改为被动语态)
We must ___(keep) the classroom clean.
We should keep our rooms clean and the air fresh all the tim
we must s______ the earth and keep it clean and beautiful
let's stop__ to keep the earth beautiful and clean.pollute)
We must keep our classroom clean and tidy句子结构
but we now have less trees ,and the air and water is pollute
We must keep our classroom clean The sentence stucture here
we must keep the classroom clean的句子基本结构