30. —This wall of air is an effective answer to the problem and it ______ work.
—But it is a question to put such a wall of air around the statue.
| A．may | B．must | C．should | D．Could |
I looked up and noticed a snake its way up the tree to catch its breakfast. (2012 .四川)
| A．to wind |
| B．wind |
| C．winding |
| D．wound |
Barbara is easy to recognize as ,she’s the only one of the women who
evening dress.(2010全国Ⅱ）
| A．wear |
| B．wears |
| C．has worn |
| D．have worn |
Listening to loud music at rock concerts caused hearing loss in some teenagers. (2010 .湖南）
| A．is |
| B．are |
| C．has |
| D．have |
He donated a lot of money to the earthquake-hit area, so we consider him.
| A．a very generous man |
| B．is a very generous man |
| C．be a generous man |
| D．the generous man |
Before driving into the city, you are required to get your car
(2012．四川)
| A．washed |
| B．wash |
| C．washing |
| D．to wash |