【正文】
ed at home yesterday _______ _______ going to school. 3. Everyday activities can _______ _______ _______ _______ the environment. 4. We should protect our earth _______ _______ _______ _______. 5. The twins look the same and we can’t _______ _______ the differences between them. 6. More and more people have _______ _______ _______ collecting waste to keep our environment clean. IV. 根據(jù)漢語意思完成句子。 1. Even the simplest everyday activities can _________(減少 ) pollution. 2. I think it’s _________(必要的 ) for us to master(掌握 ) a foreign language. 3. My puter doesn’t work. I have