Though this question is very difficult, if you ________ trying you will find the right answer.[ ]A.

题目简介

Though this question is very difficult, if you ________ trying you will find the right answer.[ ]A.

题目详情

Though this question is very difficult, if you ________ trying you will find the right answer.

[     ]

A. keep up
B. keep on
C. keep out
D. keep off
题型:单选题难度:中档来源:0117 月考题

答案

B

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