問題詳情

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

參考答案

答案：B
難度：困難0.390625
統計：A(5),B(25),C(25),D(9),E(0)