谈论保护环境的方法 — 英语填空题
题目
Danny wants to go green. Fill in the blanks with 'should' or 'shouldn't' (each word can be used more than once). We ___ ride bikes to school instead of taking cars. We ___ throw rubbish into the river. We ___ turn off the lights when we leave a room. We ___ use too many plastic bags.