We_______on this project for four hours. Let’s have a rest.
| A．are working | B．have been working | C．worked | D．had worked |
Not until he left his home ______ to know how important the family was for him.
| A．did he begin | B．had he begun | C．he began | D．he had begun |
500 yuan can ______ all my monthly expenses.
| A．cover | B．spend | C．fill | D．offer |
Tom raised his hands ______ to say something, but he remained silent in the end.
| A．even if | B．as if | C．so that | D．now that |
______ from the top of the tower, the south foot of the mountain is a sea of trees.
| A．Seen | B．Seeing | C．Having seen | D．To see |
We tried to find a table for seven, but they were all ______.
| A．given away | B．kept away | C．taken up | D．used up |