________ to the sunlight for too much time your skin will get burnt.
| A．Exposed | B．Having exposed |
| C．Being exposed | D．After being exposed |
I’d like to take _____ of this opportunity to thank you for your help.
| A．advantage | B．case | C．use | D．care |
Most people would agree that nuclear science should be developed to benefit the human being ____ harm them.
| A．more than | B．rather than | C．other than | D．better than |
Not until the early years of the 19th century _____ what heat is.
| A．man did know | B．man knew | C．didn’t man know | D．did man know |
_____ food is stored deep in the tunnel for the use of war.
| A．A great many | B．A large number of | C．Scores of | D．A large amount of |
____ she couldn’t understand was _____ fewer and fewer students showed interest in her lessons.
| A．What; why | B．That; what | C．What; because | D．Why; that |