She left the city, ________ never to return.
| A．determined | B．to determine | C．determining | D．having determined |
As civilization______, more and more people have realized the importance of preserving rare animals from extinction.
| A．stretches | B．spreads | C．extends | D．expands |
—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 |