---Tellus,Mark,whatisthecauseoftheAmericanCivilWar?---W...

問題詳情：

---Tell us, Mark, what is the cause of the American Civil War?

---Well, is it _______the black slaves wanted freedom?

A． how                   B． why

C． because             D． when

【回答】

C

知識點：連詞

題型：選擇題