She kept _________ hard at her physics and finally caught up with us.
—____ the afternoon of June 2nd, many foreigners arrived ______ Shanghai.
---What’s your ___________, Simon? –I like playing tennis..
--- water do we need to drink to keep healthy every day? ---Study shows that eight glasses should be enough.
Smoking is not allowed in public places since May 1st. It may be a good chance for some people to ______ smoking.
Mr. Zhang enjoys ___________ the piano, and he practises ________ it every day.