【单选题】听力原文:W: Not long ago an American magazine released a report, saying: 'American students are remarkably limited in their knowledge of science and their ability to use what they know.' What do you think...
A.
They have been accustomed to being obedient to their parents and teachers.
B.
They naturally do not need instant gratification before starting to do anything.
C.
They know they must sit down and work hard before making any progress.
D.
They are repeatedly told by their parents, friends and neighbors to do so.