—Bill, please turn down the music, ________Mum ________ Dad are sleeping.
—Sorry, I'll do it right away.
| A．neither; nor | B．either; or |
| C．both; and | D．Not only; but also |
Who is ______ of the three young men?
| A．clever | B．cleverer | C．cleverest | D．the cleverest |
--You don’t look ______ today. What’s wrong?
--It’s the bad fever.
| A．well | B．happily | C．hard | D．strongly |
Sometimes parents find ______ hard to communicate with their children.
| A．this | B．that | C．it | D．one |
Nowadays scientists are working hard to find out ______ to do with air pollution.
| A．how | B．why | C．when | D．what |
Good teachers can usually give the students______ advice on their study.
| A．a great many | B．huge amounts of |
| C．a large number of | D．too many |