_______ with care, one tin will last for six weeks.
| A．Use | B．Using | C．Used | D．To use |
The police found that the flat ______ and a lot of things had disappeared.
| A．has been broken into | B．has broken into |
| C．had broken into | D．had been broken into |
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 |
– Shall we go to the concert this evening?
– _____, but I have an exam tomorrow.
| A．All right | B．No way | C．Sounds great | D．With pleasure |
No one likes a person who _____ himself more than anyone else.
| A．looks for | B．belong to | C．cares about | D．gives up |
– Have you ever been to the city before?
– No. This is the first time I _____ here.
| A．was | B．have been | C．come | D．am coming |