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what D. That 。 what B. It 。 how D. That。 that B. What。 主語從句 以 it作 形式主語 ,把主語從句后置的常用句型有: 1. It+be+形容詞 +that從句 It is/was certain that – clause clear important necessary probable possible 主語從句 ( 1) It is certain that she will do well in her exam. ( 2) It is probable that he told me everything. 主語從句 2. It + be + 名詞詞組 + that從句 It is / was a pity that – clause shame duty (1) It is a pity that we can’t go. (2) It is no surprise that our team should have won the game. 主語從句 3. It + be + 過去分詞 + that從句 It is said that – clause reported thought hoped believed known 主語從句 (1) It is sa