a clerk and secretary/a clerk and a secretary【問(wèn)】 (1) A clerk and secretary are needed. (TOEFL)(2) A clerk and a secretary is enough for such a small office as ours. (TOEFL)為什么在句(1)中secretary之前不加不定冠詞是錯(cuò)誤的,而在句(2)中加上不定冠詞又是錯(cuò)誤的呢?【答......(本文共 643 字) [閱讀本文] >>