| They never know what would ______ in a hundred years. |
A.happened B.be happened C.happen D.was happened |
| There is no doubt scientific knowledge is very important for teenagers. |
A. whether B. that C. if D. what |
| the Internet, our life becomes easier, faster and better. |
A. Thanks to B. Thanks for C. For example D. Instead of |
| —Do you have enough computers at your office? —No, I think we need computers. |
A. two others B. two more C. another D. more two |
| —How many teachers are there in your school? —About 160. One third of them men teachers. |
A. have B. has C. are D. is |
| —Oh, Jenny, your dress looks nice. Is it new? —No, I it since two years ago. |
A. had B. bought C. have bought D. have had |
| —Why do you hope everyone travels by bike? —Because bikes make almost pollution. |
A. much B. no C. few D. most |