There serious air pollution if people use more and more cars.
| A．has | B．will be |
| C．will have | D．are going to be |
My father usually drives to work ______ taking the bus.
| A．instead of | B．instead |
| C．because of | D．together with |
.---Do you know if Jim______ to play basketball with us?
---I think he will come if he ______ free tomorrow.
| A．comes; is | B．comes; will be |
| C．will come; is | D．will come; will be |
The art club is for members only. You can’t go in _____ you are a member.
| A．unless | B．because | C．if | D．though |
Our teacher asks us to remember that _______ careful we are, _______ mistakes we will make.
| A．the more; the fewer | B．the fewer; the more |
| C．the more; the more | D．the less; the fewer |
My aunt said that she ________ to Guangzhou.
A has never gone B.had never gone
C.has never been D. had never been