单项选择题

We learn from the passage that ______.

A．television instruction should be a substitute for classroom lessons
B．children's shows are worthless
C．TV programs had better mend their ways
D．mystery programs should be banned

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单项选择题

According to the passage, the wasteland (Line 5, Para. 1) refers to ______.

A．Western bad men and Western good men
B．average television programs
C．the morning shows
D．television shows with desert settings

单项选择题

According to the passage, economics is ______.

A．different from sciences such as medicine
B．similar to other social sciences because it is imprecise
C．similar 1o other social sciences because a lot of nonsense is talked about it
D．different from social sciences which try to forecast the way people behave