Question

【题目】This is _____ and we must _____ on it.

A. hard work; work hardB. a hard work; work hard

C. hard work; hard workD. work hard; hard work

Answer 1

【答案】A

【解析】

试题句意：这是艰苦的工作，我们必须努力工作。Hard work艰苦的工作；work hard努力工作。英语中work为不可数名词，故选A。