問題詳情

25. Having a close, happy friend can raise a person’s mood by nine percent, ______ each unhappy friend lowersit by seven percent.
(A)while
(B) with
(C) so
(D)since

參考答案

答案：A
難度：適中0.636364
統計：A(28),B(10),C(0),D(2),E(0)