B. they use microcomputers without a stop

　　C. they exercise in one place for a long time

　　D. they watch a movie while pedaling

　　28.Some astronauts feel sick on the station during the first few days because _____.

　　A. their senses stop working

　　B. they have to stand up straight

　　C. they float out of their seats unexpectedly

　　D. whether they are able to go back to the station

　　29.One of the NASA’s major concerns about astronauts is _____.

　　A. how much exercise they do on the station

　　B. how they can remain healthy for long in space

　　C. whether they can recover after returning home

　　D. whether they are able to go back to the station

　　C

　　Technological change is everywhere and affects every aspect of life, mostly for the better. However, social changes are brought about by new technology are often mistaken for a change in attitudes.

　　An example at hand is the involvement of parents in the lives of their children who are attending college. Surveys (调查) on this topic suggests that parents today continue to be “very” or “somewhat” overly-protective even after their children move into college dormitories. The same surveys also indicate that the rate of parental involvement is greater today than it was a generation ago. This is usually interpreted as a sign that today’s parents are trying to manage their children’s lives past the point where this behavior is appropriate.

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