________ your composition carefully, some spelling mistakes can be avoided．

A．Having checked

B．If you check

C．Check

D．To check．

－Where have you been recently?

－I ________ in Hangzhou on business for a week last month．

A．have been

B．had gone

C．had been

D．was

We are looking forward to ________ another chance ________ it again．

A．be given; to try

B．give; to try

C．giving; trying

D．having; to try

－What were you trying to prove to the police?

－________ I was last night．

A．That

B．When

C．Where

D．What

－Are you pleased with what he has done?

－It couldn't be ________．Why didn't he put more effort into his work?

A．any worse

B．much better

C．so bad

D．the best

________ that caused him to serve dinner an hour later than usual．

A．It was we being late

B．It was our being late

C．It was we were too late

D．It was because we were late

－Have you ever worked with a tape recorder?

－I ________ it a lot when I was teaching English in Guang Ming School．

A．used

B．was used

C．have used

D．had used

The price system is a complex network composed of the prices of all the products bought and sold in the economy as well as ________ of a great number of services．

A．the one

B．that

C．ones

D．those

I'll leave Changsha for Beijing ________ a week, while my brother will leave Beijing for Changsha ________ our National Day．

A．in; in

B．after; in

C．after; after

D．in; after

－________ that he picked up French?

－It was in 1949 ________ he traveled in France．

A．Was it when; that

B．When was it; that

C．Was it when; when

D．When was it; when