2. 外语
  3. Very little ______ they had made an important discovery in science.

Very little ______ they had made an important discovery in science.

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问题 Very little ______ they had made an important discovery in science.
选项 A、they realized
B、they realized what
C、did they realize
D、did they realize what
答案C
解析 本题考查的是倒装句和宾语从句的用法，具有否定意义的词little位于句首，其主句中的主语和谓语要倒装。所以我们只能从C、D两项中选择，并且后面的宾语从句中主、谓、宾都很完整，只需that来引导宾语从句，而that在宾语从句中可以省略，故选项C正确，A项和B项均未使用倒装语序，可以首先排除；D项的问题在于错误地使用了引导词what，而what这一引导词需要在从句中充当一定的成分，故也应排除。
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