13. ______ you eat the correct foods ______ be able to keep fit and stay healthy.

A. Only if; will you　 　　　　　　　　　　　　 　　　 B. Only if; you will　

C. If only; will you　 　　　　　　　　　　　　　 　　D. Unless; you will

12. In the families with kids, parents usually put medicine ______ children can’t reach.

A. what　　　　 　 B. that　　　　　 　　　 C. which　　　　　　 D. where

11. ---What was it that you had ______ last night? It was too noisy.

---Oh, sorry. It was the washer and it won’t happen again.

A. work　　　　　　　　　 B. working　　　　　　　　　 C. to work　　　　　　　　　　 D. worked

10. Tim Bemers-Lee is generally considered ______ the World Wide Web, on which all the information is shared by all.

A. to have founded B. having founded　 　　 C. founding　 　　　　　　 D. to found

9. They seldom, ______, pay for software they use every day. That is, they use lots of pirated software.　

　 A. if some　　　 　　　　　　　 B. if ever　　　 　　　　　　　 　　　 C. if any　　　 　　　　　　　 D. if never

8. Britain returned Hong Kong to China in 1997, ______ decades of negotiations.

A. ended　　　　　　　　 B. to end　　　　　　　　　　　 C. ending　　　　　　　 　　　　　　　 D. having ended

7. ---Is it true that you will have a holiday soon?

---Oh, yes, I ______ the sunshine in Hainan next Friday afternoon while you’re all working!

A. will enjoy　　　　　 B. are enjoying　　　 　　　 C. will be enjoying 　　　 D. am going to enjoy

6. Take care during the holidays! Drinking too much can ______ heart disease and cause high blood pressure．

A．contribute to　　　 B．relate to　　　　　　　　　 C．attend to　　　　　　　　 D．devote to

5. As economy worsened, jobs ______ to the laid-off workers continued to be scarce．

A. valuable　　　 　　　 B. convenient　　　　 　　　 C. comfortable　　　　　　　 　　　 D. available

4. Swimming is ______ in summer, which makes it the favorite season for most boys here.

　 　A. a great fun　　　　　 B. great fun　　　　　 　　　 C. great funs 　　　　 　　　 D. very fun