The young man stopped and looked back as if ______ whether he was being followed.

Director Zhang Yimou often has his films _________ local contents, which foreigners are not familiar _________. 

----Did the reference give the information you needed?----Yes, but            it, I had to read it entirely. 

Heat wave sufferers said that they couldn’t get admitted into hospitals. They arrived at hospitals,         no bed available.

There goes the bell for the class.Let’s stop___.