—I heard a bus accident happened yesterday.
—The bus crashed. Luckily, only a few passengers aboard were _____ injured in the traffic accident.
| A．slightly | B．approximately | C．exactly | D．gradually |
It will not be long _____man can harness the solar energy and make it serve mankind.
| A．since | B．before | C．when | D．after |
Doing your homework is a sure way to improve your test scores, and this is especially true______ it comes to the classroom tests.
| A．before | B．as | C．since | D．when |
Substances will expand or contract ______ heated or cooled, but this is not the case with water.
| A．when they will be | B．if they will be |
| C．as they being | D．when |
You can arrive in Beijing earlier for the meeting __ you don’t mind taking the night train.
| A．provided | B．unless | C．though | D．until |
The old woman has loved Tom _____ he were her son.
| A．because | B．as | C．if | D．as though |