单项选择题

Sulphur has occasionally been found in the earth in an almost pure state.

A. regularly
B. accidentally
C. sometimes
D. successfully
<上一题 目录 下一题>
热门 试题

单项选择题
Since the Great Depression, the United States government has protected farmers from damaging drops in grain prices.
A. slight
B. surprising
C. sudden
D. harmful
单项选择题
Have you talked to her lately
A. lastly
B. finally
C. shortly
D. recently
相关试题