31.Years of efforts when they saw the pictures of the moon sent back to the earth by Chang’e-1.
A.paid off B.took off C.showed off D.went off
30.Migrant workers may bring about some negative impacts. They contribute greatly to the development of the cities, .
A.yet B.although C.though D.either
29.-Look! You’ve made the same mistake again!
-Oh no, not again! such a mistake.
A.I always make B.I’m always making
C.I’ve always made D.I always made
28.- was it they discovered the entrance to the cave of the ancient paintings?
-It’s a total coincidence.
A.How; that B.What; that C.When; when D.Where; that
27.We should do more such exercises in the future, I think, those we did yesterday.
A.as B.like C.except D.than
26.Yahoo! was switching to its own web search technology and its use of competitor Google.
A.finding B.making C.having D.dropping
25. to a university in the UK, international students must display a strong ability in spoken and written English.
A.Having been admitted B.to be admitted
C.Being admitted D.Admitted
24.-Wow! Jenny, I still owe you for the film ticket yesterday.
- .
A.Forget it B.No problem C.Don’t mention it D.Take it easy
23.He have forgotten to pay before he was stopped by the store keeper.
A.should B.could C.must D.would
22.Tell me, Mr. Mentakis, was Mrs. Smith one of your customers?
A.regular B.common C.average D.usual