Living in the country has its advantages, ____ freedom from pollution is the best.
| A．which | B．whose |
| C．from which | D．of which |
Have you ever noticed the house, ________ windows are always closed?
| A．where | B．which | C．when | D．whose |
I want to know when he ________ for New York tomorrow.
| A．has left | B．had left | C．is leaving | D．has been leaving |
Even on a cold day，he prefers ________out to play football ________ at home.
| A．going；rather stay | B．going；to staying |
| C．to go；rather than staying | D．to go；rather than to stay |
It was in 1969 ______ two Americans went to the moon by spaceship.
| A．that | B．before | C．when | D．Since |
—What ________ an important part in their lives?
—Friends.
| A．plays | B．takes | C．makes | D．Acts |