约翰参加了昨天下午的大扫除吗?
Did John __________________ the general cleaning yesterday afternoon?
她献身于科学,对于技术进步做出了很大贡献。
She ____________________ science,and ________________________ the development of technology.
如果我们想提高英语,要每天多读英语材料。
We ________________________ more English materials every day,if we want to improve our English.
我们的运动员要参加一些比赛,如跑步、摔跤和江苏队竞争。
Our athletes will ________________ some games,____________ running and wrestling with Jiangsu Team.
校园事故频繁发生,让每个家长很担心。
School accidents happen , which ________________________.
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