虚心请教一道语法题，谢谢

newbigfish

94-08

26. Because it is often dependent of the conditions of crystallization, the composition of the

A

哪里错了呢?是不是impotant 后应加to do sth 结构？

谢谢。

minerals in a rock can be important in determining the rock's geologic history.

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雅惠乖乖

改为：be important to determine 应该是这样，还需要继续研究～～