Question

2. The reason        for being late was that the heavy snow prevented him.

(give) 

对于迟到，他所给的理由是大雪阻碍了他。

Answer 1

2. (that/which) he gave此题考查定语从句引导词的选择。此处引导词在从句中起宾语(he gave的宾语) 作用，因此，可用关系代词that或which ,亦可省略。