問題詳情

_________ causes motion sickness continues to baffle scientists to this day.
(A) What
(B) That
(C) All
(D) The

參考答案

答案:A
難度:簡單0.820408
統計:A(201),B(20),C(7),D(11),E(0)

用户評論

羅峻豐】評論

what =先行詞+關係代名詞

Bonnie Chou】評論

baffle使困惑

gukguk】評論

(The thing which)=What causes....