Rock music ______ sound popular with the young,but it's not the favor of the aged people.( )
A.mustB.needC.shouldD.may
The talent show is ______ the game show.I like both.( )
A.as boring asB.not so bored as
C.as interesting asD.not so interested as
Our country is taking action to ______ air pollution.( )
A.cut downB.cut upC.cut outD.cut off
The girl in the classroom ______ be Sarah.She has gone to the library.( )
A.mayB.mustC.can'tD.needn't
We have worked so long.Shall we stop ______ a rest?( )
A.haveB.to havingC.havingD.to have
Rules are helpful to us,______ we have to follow them.( )
A.soB.butC.orD.because