There are over 58, 000 rocky objects in ________ space, about 900 of which could fall down onto________ earth.
| A．the; the | B．不填; the | C．the; 不填 | D．a; the |
People in Tianjin are proud of ______ they have achieved in the past few years.
| A．that | B．which | C．what | D．How |
Bears often hide themselves in places __________ can’t be found by hunters.
| A．in which | B．where | C．that | D．不填 |
There were dirty marks on her trousers _______ she had wiped her hands.
| A．when | B．which | C．where | D．That |
After a lot of questioning, Jack ______ admitted he had taken the car.
| A．frequently | B．eventually | C．absolutely | D．Generously |
My sister met him at the Grand Theater yesterday afternoon, so he ________ your lecture.
| A．couldn’t have attended | B．needn’t have attended |
| C．mustn’t have attended | D．shouldn’t have attended |