---Nowadays, it’s not very difficult to enter ________ university.

---That’s the fact, but it’s not easy to enter ________ key one.

A. an; a B. a; a C. an; the D. the; the

---The children here can receive a good ________ now.

--Yes. A great number of experienced teachers have been sent here.

A. education B. decision C. opinion D. instruction

The film is so interesting that, I think, it is ________ worth seeing twice.

A. very B. much C. well D. little

We believe that we can’t complete the difficult task in such a short time ____ their help.

A. during B. without C. among D. because of

I was very nervous when I began to make the speech(演講). I didn’t even know ____ to start with.

A. how B. when C. why D. what

---Would you go to the concert with me tonight, Jim?

---I’d like to, but then I have a few guests to ________ in the Red Rose Restaurant.

A. speak B. wait C. treat D. train

You should stick to taking exercise _____ you really do not care about your health.

A. since B. though C. until D. unless

---Jimmy, Where are you? Come to help me in the kitchen.

---Just a minute, mum. I ________ my bike in the yard.

A. repair B. repaired C. am repairing D. have repaired

________ noise pollution and we can live in a quiet environment.

A. Prevent B. Preventing C. Prevented D. To prevent

---Dad, May I go out alone tonight?

---You’d better not, Jenny. But you _____ keep an eye on your safety if you _____.

A. should; should B. may; may C. can; can D. must; must