―Whywasheunhappyyesterday?―Aletterfromhome

問題詳情：

―Why was he unhappy yesterday?

―A letter from home ______ an attack of homesickness.

      A. set off                       B. set out                       C. set about             D. set up

【回答】

知識點：詞組 短語

題型：選擇題