______ 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 句意:有证据证明语言习得的能力必须要激发才行。句中的that从句是evidence的同位语从句。由此推断主句尚缺主语和谓语。主句如为强调句型(it isevidence that…),则evidence必须要在从句中担任语法成分,此句显然不是这种情况。那么,主句就只可能是there be句型了,evidence做主句的主语,也是后面同位语从句的先行词,故选C。
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