(单选题)
______ the numbers of such developments are relatively small, the potential market is large.
A.As
B.While
C.When
D.Since
参考答案：B
参考解析：
考查while让步状语从句。句意：尽管此类开发项目的数量相对较少，但潜在市场很大。as和while都可以引导让步状语从句，但as在引导让步状语从句时要进行倒装，如：Child as he was, he knew what was the right thing to do. 故选B。
知识点：
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