碳氢化合物在石油中占（）。
A、40%以上
B、60%以上
C、70%以上
D、80%以上
参考答案：D
— I hope you liked the concert last night.
— How on earth do you know I went to the concert? I ______ you. [ ]
A. haven't told
B. hadn't told
C. didn't tell
D. won't tell
人们把重阳还看做是什么样的日子？
