单项选择题
Just over 70% of people（）for the survey said the net had become essential.
A.to question B.questioned C.question D.questioning
单项选择题 50% of the people（）for the survey were female.
单项选择题 （）her and then try to copy what she does.
单项选择题 This fire extinguisher is to be used only in case of（）.
