1、Fivetimesfour____twenty.
A.isB.are
是选A,还是B,或者是都可以?
(请问times表示乘时,谓语动词用单数还是复数?)
2、Itookacoupleofnetebooks,incaseI_____timetodosomewriting.
A.shouldB.willhaveC.hadD.arenotE.shouldhave
这个选哪个?
3、Thefollowing_____worthytakingcare.
A.areB.is
这个选哪个?