I don't think he will be back in an hour,（）?

单项选择题Somebody asked her,（）

A.did he
B.didn‘t they
C.didn‘t he
D.did they

单项选择题Silk（）by Chinese for thousands of years now.

A.has used
B.has been used
C.was used
D.is used

单项选择题By the end of this year, I（）enough money for a holiday

A.will save
B.will be saving
C.will have saved
D.will be saved

单项选择题By next year he（）in New York for five years.

A.has worked
B.has been working
C.works
D.will have worked

单项选择题The work（）by the time you get there.

A.will have been done
B.was done
C.had been done
D.has done

单项选择题The farmer caught the boys（）his apples.

A.stealing
B.stole
C.to steal
D.would stea

单项选择题（）all we should put the theory into practice.

A.Beside
B.To
C.Above
D.Of

单项选择题When a fire（）at the National Exhibition, at least then priceless paintings were completely destroyed.

A.broke off
B.broke out
C.broke down
D.broke up

单项选择题Bush's farm（）is said to be at bottom of the state of Texas in north America.

A.street
B.road
C.lane
D.avenue

单项选择题His attitude toward us seems（）

A.nicely
B.warmly
C.kindly
D.friendly