The problem will appear_____ a different welfare system will be created. [ ]A. unless B. whether C.

题目简介

The problem will appear_____ a different welfare system will be created. [ ]A. unless B. whether C.

题目详情

The problem will appear _____ a different welfare system will be created.

[     ]

A. unless
B. whether
C. until
D. if
题型:单选题难度:中档来源:模拟题

答案

B

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