A hearty laugh relieves physical tension, ________ your muscles relaxed for over half an hour.
| A．to leave | B．left |
| C．leaving | D．leave |
The two presidents agree with each other on the whole, but much remains______at the following meeting.
| A．discussing | B．discussed | C．to discuss | D．to be discussed |
The more one is ______the English-speaking environment, the better he or she will learn the language.
| A．exposed to | B．filled in | C．caught on | D．kept up |
— Have you finished your composition already?
— Yes. I ______ it in twenty minutes.
| A．have finished | B．finished | C．will finish | D．had finished |
The performance supposed to be popular______ to be a great disappointment after it was over.
| A．turned up | B．turned down | C．turned out | D．turned over |
Some pictures of the river brought the days back to the day______ they swam in it.
| A．when | B．that | C．who | D．where |