we admit that there are some problems with the new system, we believe they can be solved.A. Until B. WhileC. As D. Unless 题目和参考答案——青夏教育精英家教网—

题目内容

______ we admit that there are some problems with the new system, we believe they can be solved.

A. Until B. While

C. As D. Unless

【解析】

试题分析：句意：虽然我们承认新的系统存在着一些问题，但是我们相信他们是可以解决的。A. Until直到……才；B. While 虽然；C. As随着、因为；D. Unless除非。故选B。

考点：考查连词。

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