Americans eat____ vegetables per person today as they did in 1990.
A. more than twice B. as twice as many
C. twice as many as D. more than twice as many
Students ______ remain in their seats until all the exam papers have been collected.
A. must B. shall C. may D. can
The atmosphere of the earth ______ us from the strong sun light.
A. prevents B. keeps C. stops D. protects
---How well did John do in the match?
--Wonderful. I think we can’t have a ______ player in our football team.
A. good B. well C. better D. best
Many countries are increasing their use of natural gas , wind and other forms of ______.
A. power B. force C. energy D. strength
The fact that many college graduates get lower pay than some workers has ______ a heated discussion.
A. set out B. set about C. set up D. set off
