这个句子有错误，涉及一个关键问题：situation 要么用复数，要么加冠词 the，才可以选择答案。以下两句必居其一：

1._____ situations：填similar

Anyone who has spent time with children is aware of the difference in the way boys and girls respond to similar situations.

填similar，说明“情况指两种或多种”，所以用复数。

2. the _____ situation：填same

Anyone who has spent time with children is aware of the difference in the way boys and girls respond to the same situation.

填the same，说明“情况只有一种”，所以用单数，且必须有定冠词特指。

这些细微的知识点不可忽视！

alike 是表语形容词，不可作定语。