____ is even better is when countries help each other and build a good friendship.  

A. It
B. What
C. That
D. As
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科目：高中英語 來源：浙江省月考題 題型：單選題

____ is even better is when countries help each other and build a good friendship.  
[      ]
A. It
B. What
C. That
D. As

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