He made another wonderful discovery, ____ of great importance to science.
| A．which I think is | B．which I think it is |
| C．which I think it | D．I think which is |
Thousands of visitors were ________ to the Xi'an International Horticultural Exposition the day it opened.
| A．adopted | B．accepted | C．attracted | D．attached |
The farmers had the machine ________ all day and night.
| A．work | B．working |
| C．worked | D．to work |
Jenny hopes that Mr. Smith will suggest a good way to have her written English ________ in a short period.
| A．improved | B．improving |
| C．to improve | D．improve |
My parents have always made me ________ about myself, even when I was twelve.
| A．feeling well | B．feeling good |
| C．feel well | D．feel good |
—You look upset.What's the matter?
—I had my proposal ________ again.(2011·江苏)
| A．turned over | B．turned on |
| C．turned off | D．turned down |