Those who have __________ floods and sandstorms knows the importance of environmental protection.
| A．gone over |
| B．gone through |
| C．got through |
| D．got over |
Great changes ______ in China in the past 20 years.
| A．took place | B．have taken place | C．were taken place | D．have been taken place |
The question is ______ it is worth doing.
| A．if | B．whether | C．which | D．what |
The students were ____ over the ____ problem, listening to the teacher with a ____
expression on their faces.
| A．puzzled; puzzling; puzzling | B．puzzled; puzzling; puzzled |
| C．puzzling; puzzling; puzzled | D．puzzling; puzzled; puzzling |
---Would you mind my sitting here ____ lunch? ---______.
A. and have, No, not at all C. and having, No, thank you.
C. to have, Never, go ahead. D. and have, Oh, it’s my pleasure.
It was rude ______ you to stare at the foreigner when he passed by just now.
| A．of | B．for | C．with | D．to |