38 The teacher answered the question ______ in class.
(A)which asked
(B)that were asked
(C)was asked
(D)asked

A：我們所謂的關係代名詞 + BE動詞可以省略的情況 (亦即關係子句的減化) 是指分詞 (過去分詞和現在分詞) 形容詞，所以BE動詞 + 形容詞的情況通常是不能省略的，否則就會出現語法不對、意思不清的情況。根據上述，形容詞子句 (即關係子句) 可以省略關係詞和/或BE動詞的情況有下列幾種：

(1) 關係詞在關係子句中當受詞，如 He is the man whom/ that I saw yesterday. (他是我昨天看到的男子) (句中的 whom/that 可以省略)。

(2) 關係詞在關係子句中當主詞，其後接 BE動詞 + 現在分詞或過去分詞，這時可以省略關係詞及BE動詞，而留下分詞：

• The train now arriving (= which is now arriving) at platform 1 is the 6:36 from Taipei. (現在開抵第一月台的火車是 6 點 36 分從台北開出的)
• Food sold (= which is sold) in this supermarket is of the highest quality. (這家超市所販賣的食物都是品質最好的)

所以以本題The teacher answered the question ______ in class. 

原本應為:The teacher answered the question (which was asked) in class.   符合上面例外條件

後來應為:The teacher answered the question (asked) in class.           asked為過去分詞