. Doing your homework is a sure way to improve your test scores, and this is especially true ______ it comes to classroom tests.
| A．when | B．since | C．before | D．after |
To live in ______ countryside for some time is really ______ helpful experience to children growing up in the cities.
| A．a; a | B．a; the | C．the; a | D．the; the |
He is such ______! He is sure to ruin（毁坏）all the fun here if you invite him to the party.
| A．a wet blanket | B．a black sheep |
| C．a white elephant | D．a green finger |
The place_____ the bridge is supposed to be built should be _____ the cross-river traffic is the heaviest.
| A．which; where | B．where; in which |
| C．in which; where | D．in which; in which |
To tell you the truth, the accident and the damages ______ caused frightened me so much that I almost gave up driving ever since.
| A．it | B．they | C．which | D．what |
During the holiday I bought a CD player, _____ was rather reasonable.
| A．its price | B．of which price |
| C．the prices of which | D．whose price |