——_______is your Maths teacher?
——I don’t know.He looks very young.
| A．How many | B．How much |
| C．How old | D．How long |
She had to _________in hospital ________she was better.
| A．not remain ; until | B．be remain ; till |
| C．be remained ; until | D．remain ; till |
He was busy chatting online that he didn’t anything dangerous on the road while walking. As a result, he was knocked down by a car.
| A．too; to notice | B．so; notice |
| C．too; noticing | D．so; noticing |
_________ the boy student has made marks in his study, he never shows off.
| A．Although; much | B．Although; high |
| C．But; much | D．But; good |
Don’t touch the machine_________ the teacher allows you to.
| A．if | B．unless | C．since | D．that |
Classical music has _____ lasting value while folk has _____strong local colour.
| A．a; a | B．an; a | C．a; / | D．an; / |