Don't bother Tom, he is________with the experiment on water molecules in the lab.
| A．focused | B．fixed | C．occupied | D．concentrated |
The children went home from the grammar schoo1,their lessons ________ for the day．
| A．finishing | B．finished |
| C．had finished | D．were finished |
The country has already sent up three unmanned spacecraft, the most recent _____ at the end of last March.
| A．has been launched | B．having been launched |
| C．being launched | D．to be launched |
—Do you want another drink ?
——.
| A．I don’t think so | B．No way | C．Not at all | D．I wouldn’t say no |
Practising Chinese kung fu can not only one’s strength , but also develop one’s character .
| A．bring up | B．take up | C．build up | D．pull up |
The doctor recommended that you swim after eating a large meal .
| A．wouldn’t | B．couldn’t | C．needn’t | D．shouldn’t |