Though it is 20 years ______ we last met, I still remember the scene______ we got separated on a snowy day.
| A．before; where | B．before; which |
| C．since; when | D．since; where |
—How do you_____to her unkindly behavior?—Only silence.
Which of the following is wrong?
| A．react | B．answer | C．reply | D．respond |
Burning all the lights in the classroom will be a great______ on electric power.
| A．waste | B．lack | C．drain | D．damage |
The environmentalists said wild tiger’s______ on the Thai mountain was a good indication of the better environment.
| A．escape | B．absence | C．attendance | D．appearance |
Although I had read the book assigned by the professor several times, it didn’t make any______ to me.
| A．meaning | B．importance | C．sense | D．significance |
If you build a house with good_______ , it will last long.
| A．foundation | B．floor | C．basis | D．ground |