問題詳情

15. Before the exam, all my other family members must keep their voices down _______ my sister may concentrate on herlessons.
(A) so that
(B) lest
(C) in case
(D) while

參考答案

答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)