Ⅰ.单句语法填空
1．Sam tried hard to win his father's approval(approve).
2．We'd better make preparations(preparation)against a rainy day.
3．There was so much work to do that everybody got bored.
4．This store often charges(charge)only 65 US cents for a dozen of eggs.
5．I'm afraid your parents won't approve of your going there.
6．It is past midnight，and it's time for us to go(go)home.
7．Don't keep your engine running(run) when you leave your car.
