5. When I mentioned our plans for a trip abroad, the kids _________ life at once.

　 A. came to　　 B. got to　　　 C. return to　　 D. went to

4. He got full makes in this math exam, ______ that he was the best among the class.　 A. to prove　　 B. proved　　 C. having proved　　 D. proving

3. The new technology will make __________ possible to grow food with very little water.　

　A. it　　　 B. it is　　　 C. that　　　 D. that is

2. When I first set _________ in Australia, I didn’t know what the future might have in ______ for me.

　 A. my foot; the store　 B. a foot; the store　 C. foot; store　　 D. feet; stores

1. I prefer to travel light. I mean I like traveling without taking __________.

　 A. many luggages　 B. much luggage　 C. a luggage　 D. any luggages

7. Food prices today range between $5 and $50.

6. Prices varies with the seasons.

5. Estuaries provide both recreation and education for human beings.

4. Water, which seems so common, is what makes life possible.

3. Marine animals and planets take advantage of the density of water.