Drivers shouldn’t be allowed _______ after drinking, or they will break the law. A. drive B. driving C. to drive
There are ________ books in the National Library.
Listen! Someone_____ singing in the next room.
How about_________out for a walk, mum?
I don’t think he tried his best to learn English, ___________?
He spends as much time as he can ___________ English every day.