英语·单选(主谓一致)
1._____ofthelandinthatdistrict___coveredwithteesandgrass.
a.twofifth;isb.twofifth;arec;twofifths;isd.twofifths;are
2.asaresultofdestroyingtheforests,alarge_____ofdesert——coveredtheland.
a.number;hasb.quantity;hasc.number;haved.quantity;have
3.heistheonlyonethestudentswho——awinnerofscholarshipforthreeyears.
a.isb.arec.havcbeend.hasbeen