Only in the library _____ the book.
| A．we can get | B．can we get | C．can get we | D．we get |
_______ in the regulations that you shouldn't tell other people the password of your e-mail account.
| A．What is required | B．What requires | C．It is required | D．It requires |
The manager, _______ it clear to us that he didn't agree with us, left the meeting room.
| A．who has made | B．having made | C．made | D．making |
I'm moving to the countryside because the air there is much fresher than _______ in the city.
| A．ones | B．one | C．that | D．those |
While watching television, _______.
| A．the doorbell rang | B．the doorbell rings |
| C．we heard the doorbell ring | D．we heard the doorbell rings |
Only after my friend came _______.
| A．did the computer repair | B．he repaired the computer |
| C．was the computer repaired | D．the computer was repaired |