To give the baby an injection is really ________.(单选)A.hard work B.a hard work C.work hard D.hard-working为什么?

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To give the baby an injection is really ________.(单选)A.hard work B.a hard work C.work hard D.hard-working为什么?

To give the baby an injection is really ________.(单选)A.hard work B.a hard work C.work hard D.hard-working为什么?
To give the baby an injection is really ________.(单选)
A.hard work B.a hard work C.work hard D.hard-working
为什么?

To give the baby an injection is really ________.(单选)A.hard work B.a hard work C.work hard D.hard-working为什么?
a
首先b就不对,work表示工作的时候不可书,表示作品的时候才可数
c表示工作很认真努力,作壮语
d同样表示很努力,但用于定于
a表示是很困难的工作

A
work是不可数名词,不加a,
注意区别 固定用法 hard work
a hard time的区别.

我认为是B