The solution cannot be determined _____the problem is identified.

admin2014-01-06  28

问题 The solution cannot be determined _____the problem is identified.

选项 A、if
B、when
C、until
D、which

答案C

解析 Until indicates a time or an action that another action depends upon. Choice (A) is conditional and is not logical in the sentence. Choice (B) indicates a time relationship but is not logical in the sentence. Choice (D) is a relative pronoun.  
转载请注明原文地址:https://jikaoti.com/ti/fPUsFFFM
0

最新回复(0)