Now everyone is concerned about how to conquer the economic crisis（）is very important for us to be able to preserve our standard of living.

单项选择题Every means（）tried but without any result．

A．have been
B．is to be
C．are to be
D．has been

单项选择题During the last Olympics, all the rooms in the Olympic Village in London are so designed that they are （）to the disabled.

A．accessible
B．available
C．convenient
D．valid

单项选择题—I'm going to study engineering in Tsinghua University tomorrow. — （）.

A. All the best in your study
B. All the best with your study
C. All the best in your business
D. All the best in your new job

单项选择题It was dark in the cave so she（）a match.

A. struck
B. hit
C. fired
D. burned

单项选择题My mother likes （）TV, but she doesn't like （）it now.

A．to watch; watching
B．watching; to watch
C．to watch; to watch
D．watching; watching