The building is so old that it should be ______ at once .
A. sold out B. broken down C. pulled down
Many advertisements ______ teenagers.
A. are used for B are filled with C are aimed at
More than 100 workers _______ from the Wangjialing Coal Mine last year.
A. saved B. are saved C. were saved
---I think that cats are the most important animals in China because many people have them as pets.
---_____. I feel that pandas are more important because there aren’t very many of them left.
A. I agree with you. B. I disagree. C. I think so.
_______ we have learned about 2000 English words.
A. At first B. After all C. So far
Can you tell me _____ there are any good museums in the city?
A. if B. unless C. although
