Not until recently ______the development of tourist-related activities in the rural areas.
| A． |
they had encouraged |
B． |
had they encouraged |
| C． |
did they encourage |
D． |
they encouraged |
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 |
He can’t tolerate by her again and again during the report, so they quarreled at last.
| A．interrupting | B．to be interrupted |
| C．being interrupted | D．to interrupt |
______ the instructions very carefully when filling in the form.
| A．Following | B．To follow |
| C．Follow | D．Followed |