Air pollution will get worse and this will do________to people，for example，it can cause cancer.
| A．damage | B．injury |
| C．good | D．harm |
The population of this city, 30% of which_______, ______ 10% in the last two years.
| A．are Chinese; has risen by | B．are China; has fallen by |
| C．is Chinese ; have increased | D．is China; have reduced by |
The soil that had been converted to ____ flowers was on its way ______ .
| A．grow; off | B．growing; out | C．grow; out | D．growing; by |
It’s really very dangerous, one more step, _____ the baby will fall into the well.
| A．or | B．so | C．but | D．and |
The students forbidden _____ after class in WC are prevented _____ after school.
| A．to smoke; to smoke | B．to smoke; from smoking |
| C．smoking; smoking | D．smoking; to smoke |
–Michael was late for Mr. Smith’s oral class this morning.
--_____? As far as I know, he never came late to class.
| A．How come | B．So what | C．Why not | D．What for |