2. 外语
  3. ______is often the case with children, Tom was completely better by the time the doctor arrived.

______is often the case with children, Tom was completely better by the time the doctor arrived.

admin2009-09-15  78
问题 ______is often the case with children, Tom was completely better by the time the doctor arrived.
选项 A、It
B、As
C、What
D、Which
答案B
解析 关系代词代替整个句子，且位于句首只能用as来引导。
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