(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
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
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
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
(2012·四川)—Goodbye，John.Come back again sometime.
—Sure，________.
A．I did B．I do C．I shall D．I will
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
