题目内容：

1.The scientists from___USA live in___Ninth Street
A./,the B.the,/
我选的A答案是B,不是序数词前用the吗?
2.The market isn't far from here.It's only___ bicycle ride.
A.half an hours' B.half an hour's
我选的A答案是B,为什么?
3.The boy always stays there for___.
A.one and half hour B.one and a half hour C.one and half hours
D.one and a half hours 为什么选D?
4.Twelve___were hurt,but no ___were lost in that accident.
A.person,life B.people,lives C.peoples,lives D.persons,life
people不是不可数吗?
5.These Germans want to have some___for supper,so they decided to catch___now.
A.fish,many B.fishes,much C.fish,much D.fishes,many
fish不是不可数吗?

优质解答

1.排除一下就知道了.“the U.S.A.”是固定的,一定要“the”
2.半小时没有超过1,因此hour不能是复数的
3.这是固定的表达方法,表示一个半小时
4.people是集体名词,本身是复数的.（若要表示一个人,应用“a person”）
5.fish这个单词较为特殊,作为食物时,它是不可数的；但若是值小溪里的fish,又是可数的.some既可以修饰可数也可以修饰不可数.