15. We can take a ride _________the boat for several days.

　 A. in　　 B. at　　 C. over　　 D. on

14. The Hangzhou National Tea museum is a great place _________tea.

　 A. enjoy　　 B. enjoying　　 C. enjoyed　　 D. to enjoy

13. It’s _________a nice invention that I’m wondering who _________it.

　 A. so, invented　　 B. such, invented　　 C. so, did invent　　 D. such, did invent

12. They _________a tent by the lake and had a picnic.

　 A. put on　　 　B. put up　　 C. put off　　 D. put out

11. Mary _____ever ____the Computer Museum.

　 A. has, gone to　　 B. has, been to　　 C. has, visited to　　 D. has, traveled

10. Hi, Mary. Where ________you ________?

　 A. have, gone　　 B. have, been　　 C. did, go　　 D. do, go

9. ---Where’s Mary?　　　　　　　　 ---She _________for the Space Museum.

　 A. has gone　　 B. has been　　 C. has went　　 D. has left

8. ---Hello! Could I speak to Mary?　　 ---Sorry, she _________to the library.

　 A. has gone　　 B. has been　　 C. went　　 D. is going

7. He _________that he won’t have enough time for his homework tonight.

　 A. unbelieves　　 B. sure　　 C. afraid　　 D. fears

6. ________it’s hard to climb, they plan to climb the mountain next week.

　 A. Because　　 B. Whether　　 C. If　　 D. Whatever