(2010·安徽)It was from only a few supplies that she had bought in the village ________ the hostess cooked such a nice dinner.

A．where B．that C．when D．which

I told them not everybody could run as fast as you did，________？(2011·重庆)

A．could he B．didn't I

C．didn't you D．could they

He must be helping the old man to water the flowers，________？

A．is he B．isn't he

C．must be D．mustn't he

You and I could hardly work together，________？

A．could you B．couldnt' I

C．couldn't we D．could we

It's the first time that he has been to Australia，________？

A．isn't he B．hasn't he C．isn't it D．hasn't it

(2012·四川)—Goodbye，John.Come back again sometime.

—Sure，________.

A．I did B．I do C．I shall D．I will

Walmart，which is one of the largest American supermarket chains，________ some of its stores open 24 hours on Mondays through Saturdays.(2012·安徽)

A．keeps B．keep C．have kept D．had kept

All the scientific evidence ________ that increasing use of chemicals in farming ________ damaging our health.(2012·湖南)

A．show；are B．shows；are

C．show；is D．shows；is

The basketball coach，as well as his team，________ interviewed shortly after the match for their outstanding performance.(2012·陕西)

A．were B．was C．is D．are

(2011·湖南)One－third of the country ________ covered with trees and the majority of the citizens ________ black people.

A．is；are B．is；is C．are；are D．are；is