According to ________ announcement by Guangzhou Price Bureau, ________ new measures which have been taken recently are expected to cut the operation costs of each taxi driver by 1280 yuan．

A．the; 不填

B．an; the

C．不填; the

D．an; 不填

The writer and professor ________ to ________ abroad for two years．But no one knows which country he studied in．

A．are said; be studying

B．is said; have studied

C．are said; to study

D．is said; have been studying

Nothing else ________ more important than water in the place like a desert．

A．we can’t find

B．can’t we find

C．can we find

D．we can find

________ all you had done to him , he still treated you so kindly．

A．In spite

B．No matter

C．Despite

D．Although

________ the problem of land erosion getting more serious , the government is searching for a way to deal with it．

A．As

B．With

C．When

D．If

As far as we know , traveling in space has been made ________ with the development of science and technology．

A．it is possible

B．it possible

C．possible

D．impossible

A：Professor Hopkins didn’t turn up last night , did he?

B：No , we ________ for him．A whole night was wasted．

A．needn’t have to wait

B．couldn’t have waited

C．needn’t have waited

D．didn’t need to wait

Don’t disturb me．I ________ the letters all morning and ________ ten so far．

A．write; wrote

B．am writing; have written

C．was writing; wrote

D．have been writing; have written

Li Ping works hard at his lessons , he didn’t pass the exams last time , ________．

A．though

B．yet

C．however

D．although

Bob has worked out an excellent plan．In fact , I doubt whether anyone else in the department has ________ idea．

A．a good

B．a better

C．the better

D．the best