单项选择题
50% of the people（）for the survey were female.
A.were questioned B.who questioned C.who were questioned D.question
单项选择题 There are many cities（）very fast.
单项选择题 Just over 70% of people（）for the survey said the net had become essential.
单项选择题 There are often advertisements（）to other websites on the Internet.
