7．has been held 考查动词的时态和语态。It is the first time that…后接现在完成时，此处是被动语态。
8．that you called me 考查强调句型。考查强调句型的基本结构：It is / was ＋ 被强调部分 ＋ that ＋ 句子的其他部分。
9．What is wellknown/What we all know 考查主语从句。首先要选择what作引导词，在表达上可以采用主、被动两种形式。
10．( that/which had been )referred to 考查定语从句或过去分词作定语。“提到”要表达为refer to，其被动结构为be referred to；由语境可知动词时态用过去完成时最佳。
