单项选择题

The Lost Sea is unique because it is ()

A. part of a historical cave system
B. the biggest underground lake in the world
C. listed in the Guinness Book of World Records
D. the largest body of water in Tennessee

<上一题目录下一题>

热门试题

单项选择题

At first, the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly()to another subject.

A. committed
B. switched
C. favoured
D. transferred

单项选择题

21()

A.stopped
B.insisted on
C.finished
D.given