問題詳情

20. The new janitor, _____ the remodeled security system, triggered the alarm by accident.【請在下列各題中選出最適當的答案】
(A) never understand
(B) not been understood
(C) not to know
(D) not understanding

參考答案

答案：D
難度：適中0.518519
統計：A(5),B(2),C(2),D(14),E(0)