小编整理历年托福词汇题，并附正确答案，本期题目为：concealed，看看你能答对吗?
The asphalt at La Brea seeps to the surface, especially in the summer, and forms shallow puddles that would often have been concealed by leaves and dust.
The word “concealed” is closest in meaning to which of following?
(A) highlighted
(B) covered
(C) transformed
(D) contaminated
正确答案：B
