The scientists in China are trying __________ the ways to reduce the fog and haze (减少雾霾)．
| A．look for | B．to look for |
| C．to find out | D．find out |
We students can _______ food and old clothes to the homeless people, and the teachers can __________ learning skills for the poor children.
| A．provide; give | B．provide; offer |
| C．offer; give | D．give; provide |
Which of the following signs can’t be found in a hospital?
—Our school is so big. We must clean it up as soon as possible.
—Don’t worry. ________.
| A．Better to be safe than sorry |
| B．It’s raining cats and dogs |
| C．Each dog has its day |
| D．Many hands make light work |
-Hello, Jenny. Your box looks so heavy. Let me give you a hand.
-_______I'm OK.
| A．That's all right. | B．No, thanks. |
| C．Well done. | D．You are welcome. |
His father had an important meeting just now, _______?
| A．did he | B．had he |
| C．didn't he | D．hadn't he |