I have a lot of homework to do today, _________ I cannot go swimming with you.
| A．because | B．so | C．then | D．But |
Take a map with you while traveling ________ you have a guide or know the city well．
| A．since | B．if | C．unless | D．because |
The children will climb the hill if it _____ tomorrow.
| A．won’t rain | B．didn’t rain |
| C．doesn’t rain | D．isn’t raining |
If you are weak ____ a subject, ______your teacher for advice can help.
| A．to, asking | B．in, ask |
| C．to, to ask | D．in, asking |
While we _________, we saw a UFO land on a street.
| A．were shopping | B．shopped | C．are shopping | D．shop |
Jim was listening to music _______his sister was playing with a toy.
| A．until | B．while | C．because | D．after |
I was surfing the Internet my brother was doing his homework.
| A．after | B．because | C．while | D．When |
_______ the street, don't forget to watch the traffic lights.
| A．While crossing | B．While crossed |
| C．While being crossing | D．While be crossed |
The Greens will visit Yueyang if they _____ to China.
A. comes B. come C. will come
If Jim ______ free tomorrow, I will ask Tom to go instead.
| A．doesn’t be | B．isn’t |
| C．won’t | D．won’t be |
— The air pollution is terrible.
— It will be worse ________ we take action to protect the environment.
| A．if | B．unless | C．until | D．when |
—I don’t know _______he will come tomorrow. _______he comes, I’ll tell you.
—That’s a deal!
| A．if, Whether | B．whether, Whether |
| C．if, That | D．if, If |
You good grades if you hard.
| A．won’t get; won’t study |
| B．won’t get; don’t study |
| C．don’t get; don’t study |
| D．don’t get; won’t study |
This time I don’t know if I _____ the exam. If I _____ the exam, I’ll have a great vacation.
| A．pass; pass | B．will pass; pass |
| C．pass; will pass | D．will pass; will pass |
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