单项选择题

Questions 11 to 18 are based on the conversation you have just heard

A．His mother wants him to do his homework.
B．He has to finish his homework.
C．He is too excited to sleep.
D．He doesn’t know it is very late.
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单项选择题
A．He did poorly on the first exam.B．He got more than eighty percent right.C．Eighty percent of the students did well.D．He did much better than he thought.
A．He did poorly on the first exam.
B．He got more than eighty percent right.
C．Eighty percent of the students did well.
D．He did much better than he thought.
单项选择题
The author states all the following EXCEPT that ______.
A．the development of present technologies can not provide any answers to today's problems
B．an increasing number of young scientists are taking a great interest in biological and social sciences
C．many people as well as scientists have come to understand the limits of natural resources
D．many scientists argue that high technology is something but not everything
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