問題詳情

18. Sometimes, people are not conscious of the importance of health. Only when they lose health ______ its importance.
(A) they know
(B) that they know
(C) do they know
(D) they do know

參考答案

答案：C
難度：非常困難0
統計：A(0),B(1),C(0),D(0),E(0)

用户評論

【Miss Taro】評論

Only 後面為副詞子句或介系詞片語，需使用倒裝句