22、 _______ around the Water Cube, we were then taken to see the Bird’s Nest for the 2008 Olympic Games.

A. Having shown        B. To be shown           C. Having been shown        D. To show

21、 Mary had to work at evenings and weekends. Only in this way ________ able to complete the report by the deadline.

  A. was she                     B. she is                        C. had she been           D. she has been

20、Far from perfect though this trip is, I think it’s well worth _____ we paid.

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

19、―Is this your second car?

―Yes, Blue is always my color. It’s a little _______ but still fits _______ the garage.

A. wider; more easily      B. wider; easily   C. widest; more easily  D. widest, easily

18、 After the Shenzhou VI capsule touched down, two astronauts succeeded in traveling around the earth, thus again __________ China is a global space power.

   A. to have proved     B. to prove     C. proving     D. being proved

17、The sports meet, originally __________ be held last Friday, was finally delayed because of the bad weather.

A. due to        B. thanks to               C. owing to             D. according to

16、 I _____ in London for many years, but I’ve never regretted my final decision to move back to China.

A. lived             B. was living              C. have lived               D. had lived

15、We’ll have to think twice before we decide to buy a product an advertisement ______.

A. makes               B. suggests          C. performs                  D. confirms

14、Most plants rely on light from the sun, ______ one plant, moss, is able to make do with almost no light. 

A. but                    B. and                   C. so                       D. for

13、Persons under 18 ______ not be employed in night work in the United States.

A. can                  B. may                C. will                    D. shall