Environmental experts point out that ______ some serious problems such as global warming, but it also could threaten human life.
| A．not only does increasing pollution cause |
| B．not only causes increasing pollution |
| C．not only increasing pollution causes |
| D．not only increasing pollution does cause |
He worked hard to some money for his retirement.
| A．set aside | B．set out | C．set off | D．set about |
You know I have no for foreign languages.
| A．present | B．gift | C．knowledge | D．character |
- will you go out for a walk?
- I’m busy. Please leave me .
| A．alone | B．lonely | C．single | D．to be lonely |
The discovery of new evidence led to .
A. the thief having caught B. catch the thief
C. the thief being caught C. the thief to be caught
hardly made Allen pay any attention to correcting his mistakes.
| A．scolding | B．To be scolded | C．Being scolded | D．Having scolded |