—Why do you look worried?
—There are so many problems______.
| A．remaining to settle | B．remained settling |
| C．remaining to be settled | D．remained to be settled |
It is highly desirable that every effort to reuse the pollution in Beijing.
| A．is made |
| B．was made |
| C．were made |
| D．be made |
It is said that Tom’s sister fell off her bike on her way to school, _____ in the left leg.
| A．seriously damaging |
| B．hurting badly |
| C．breaking seriously |
| D．badly hurt |
to his research, he spared no time to spend a weekend with us.
| A．Devoting |
| B．Devoted |
| C．Caught |
| D．Lost |
A man is often afraid of .
| A．dying; dead |
| B．dead; death |
| C．dead; dying |
| D．dying; death |
Mary was not afraid of .
| A．laughing |
| B．laughing at |
| C．being laughed |
| D．being laughed at |