82（）

单项选择题What would air passengers like to have in return if they had to pay for certain benefits（）

A．More gifts and souvenirs.
B．More comfortable rest rooms.
C．More choices of foods and drinks.
D．More personal spaces on the plane.

单项选择题The researchers make the experiment with the purpose of finding（）

A．if pictures can affect people’s choice of their drinks
B．if pictures of eyes can make people more watchful
C．if people have different responses to the same picture
D．if people behave better when they feel they are being watched