Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.
| A． |
why |
B． |
where |
C． |
how |
D． |
when |
（）____your own needs and styles of communication is as important as learning to convey your affection and emotions.
| A．Understanding | B．To be understood |
| C．Being understood | D．Having understood |
Drivers are warned that it is dangerous to talk on the phone while________.
| A．drive | B．driving |
| C．drove | D．to drive |
Research found that children who drank mainly soda were more than twice as likely as those who drank no soda _________ signs of aggression.
| A．showing | B．shown |
| C．to show | D．show |
that the country leaders can lead them out of the financial problems, people are becoming more optimistic about the future of the country.
| A．Convincing | B．Having convinced |
| C．To convince | D．Convinced |
—Have you finished your homework?
—Not yet. Now I regret the whole afternoon surfing on the Internet.
| A．wasting | B．in wasting |
| C．to waste | D．to be wasting |