.At this moment the bell rang _______ the end of class.
| A．announce | B．announcing | C．announced | D．to announce |
We always keep ______ spare paper, in case we run out.
| A．too much | B．a number of | C．plenty of | D．a good many |
—I have studied growing plants as one of my interests. Could I make some suggestions?
—______.
| A．You will make it. | B．Go right ahead. |
| C．Don’t mention it. | D．Take it easy. |
________ recent developments we do not think your scheme is practical.
| A．In view of | B．In memory of |
| C．In case of | D．In favor of |
Science and technology have __________ in important ways to the improvement of agricutural production.
| A．attached | B．assisted | C．contributed | D．witnessed |
It _________ you to at least 50% off the regular price of either frames or lenses when you buy both.
| A．presents | B．entitles | C．credits | D．tips |