The day will come _____ the people all over the world will get rid of poverty.
| A．that | B．how | C．when | D．where |
It isn't quite _____ that he will be present at the meeting.
| A．sure | B．right | C．exact | D．certain |
Some friends tried to settle the quarrel between Mr. and Mrs. Brown without hurting the feeling of____ , but failed .
| A．none | B．either | C．both | D．neither |
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 |