2. 外语
  3. ______ evidence that language-acquiring ability must be stimulated.

______ evidence that language-acquiring ability must be stimulated.

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问题 ______ evidence that language-acquiring ability must be stimulated.
选项 A、It being
B、It is
C、There is
D、There being
答案C
解析 考查there be句型。that引导的句子作evidence的同位语，因此需要选择主谓结构。又如：There was some evidence that the documents had been tampered with．(有某些证据说明文件已被篡改。)A和D都不是主谓结构，可先排除。误选B的同学可能认为it作that从句的形式主语，但是让作形式主语时，表语一般用形容词，而不是名词evidence。
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