Bicycling is a good exercise;________ it does not pollute the air.
| A．besides | B．beside | C．therefore | D．otherwise |
_______ you wait a few more minutes? It’ll be your turn soon.
| A．Must | B．Should | C．Could | D．Might |
—I called you at 4:00 yesterday afternoon, but no one answered.
—Sorry, I ______ with my friends at that time.
| A．swim | B．swam | C．will swim | D．was swimming |
You won’t feel happy at school ______ you get on well with your classmates.
| A．though | B．when | C．unless | D．because |
I have some problems with my English writing. Can you give me some________?
| A．advice | B．decisions | C．information | D．messages |
—Will you take part in the English speech competition tomorrow?
—Sure. I see as a chance to prove_________.
| A．myself | B．me | C．yourself | D．you |