Xiamen Xiang'an Tunnel, _____ is the first undersea tunnel built in mainland China, opened to traffic on April 26th.
Mr. Black has been teaching English in a middle school _____ he came to China.
. — What's that noise? —Oh , I forgot to tell you. The new machine ________
—Sorry. I didn’t break the plate______. —It’s OK. Don’t worry about it.
_____ your classmates and you will make more good friends.
—What’s the matter with you, Sandy? —I’m _____ a bad cold. I think I am dying.