-I think science is more useful than art.
-I disagree. I think art is science.
| A．not so useful as | B．less useful than |
| C．the most useful of | D．as useful as |
——I think Betty is very helpful.
—— she always gives her seats to others on the bus.
| A．I agree. | B．I’m afraid not. |
| C．Really. | D．Why not? |
Why get up early?
| A．don’t | B．aren’t |
| C．not | D．not to |
We believe things will get better because many peoplethe children in poor areas.
| A．think of | B．hear of |
| C．care about | D．wonder about |
They planted trees andtrees is 500.
| A．the number of; a number of |
| B．the number of; the number of |
| C．a number of; the number of |
| D．a number of; a number of |
She makes her class ，and she always makes the students .
| A．interesting, laughing | B．interested, laugh |
| C．interesting, laugh | D．interested, laughing |