That is worthwhile pointing out that heating may bring about certain change in t

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问题 That is worthwhile pointing out that heating may bring about certain change in the structure of any material.

选项 A、This
B、There
C、What
D、It

答案 D

解析这句话的意思是：值得指出的是，加热可能会导致任何材料结构发生某些变化。本题考查it作形式主语的用法。此处pointing out that…部分是句子真正的主语，作形式主语的只能是it，因此选D。

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