提环保建议的情态动词 — 英语选择题
题目
Tom 在班里分享环保小妙招，他说的句子中空缺处应填入哪个词？To make our city cleaner, people ______ throw rubbish into the river, and we ______ take reusable bags when shopping. A. shouldn't; should B. should; shouldn't C. can; can't D. must; can't