.--How long have you ________there? --About four years. ~
| A．come | B．gone | C．left | D．worked |
At the conference, Premier Li Keqiang urged all the government departments ______ effective measures to improve work efficiency.
| A．took | B．must take | C．take | D．are to take |
_______to sunlight for too much time will do harm to one’s skin.
| A．Being exposed | B．Having exposed | C．Exposed | D．After being exposed |
We tried to find a table for seven, but they were all _________.
| A．given away | B．used up | C．taken up | D．kept away |
Without the ____ of my friends, how could my company have lived through the hard times.
| A．admiration | B．assistance | C．admission | D．achievement |
By the time he got up, I ______ for two hours in the factory.
| A．have worked | B．worked | C．was working | D．had been working |