________ our surprise, he bought 20 hamburgers.

A. with

B. At

C. To

D. In

He cleans the kitchen every day to keep it _______.

A. is clean

B. cleaning

C. cleans

D. clean

?How long ________ she ________ ?

?For six years.

A. has; been staying

B. have; been staying

C. did; stay

D. did; stayed

Jack has studied Chinese in this school ________ the year of 2000.

A. since

B. in

C. on

D. by

I have read ________ book on the shelf.

A. each

B. every

C. each of

D. every of

Up to now, my brother ________ 1 000 foreign stamps.

A. collected

B. has collected

C. has gathered

D. gathered

Hi! Jim! Nice to meet you again! It's one year since I last ________ you.

A. saw

B. see

C. seeing

D. have seen

?What a nice bike! How long ________ you ________ it?

?Just two weeks.

A. will; buy

B. did; buy

C. are; having

D. have; had

?Tom, can I borrow your book Chicken Soup?

?Sorry, I ________ it to Mary.

A. lent

B. have lent

C. had lent

D. lend

They are still working in the field. They ________ for two hours.

A. had been working

B. have been working

C. worked

D. are working