i don’t think we’ve doing enough to protect our environment

i don’t think we’ve doing enough to protect our environment I don't think we men spend enough time with our kids. 有we me We′re doing a lot to protect our environment ,but it is not We ___ protect our environment. what should we do to protect our environment? We should use（ ） plastic bags to protect our environment. 请问We should make every effort to protect our environment. what can we do to protect our environment?同义句 How to protect our environment 《How to protect our Environment》 To protect the environment, supermarkets don’t __ free, plas I think _______ our duty to keep our environment clean and t