试题来源:托业-4
【单选题】 The solution cannot be determined _____the problem is identified.
A.(A) if
B.(B) when
C.(C) until
D.(D) which
参考答案:C
网考网解析:
Until indicates a time or an action that another a... 查看试题解析出处>>
试题来源:托业-4
【单选题】 The solution cannot be determined _____the problem is identified.
A.(A) if
B.(B) when
C.(C) until
D.(D) which
参考答案:C
网考网解析:
Until indicates a time or an action that another a... 查看试题解析出处>>
发布评论 查看全部评论