Keys should never be hidden around the house since thieves know where to look.
A. virtually
B. variously
C. unavoidably
D. invariably
网友回答
A. virtually
B. variously
C. unavoidably
(答案→)D. invariably
解析：invariably 总是, 不变地。Virtually 事实上, 实际上。unavoidably不可避免地。