单项选择题


A．It could help people of all ages to avoid cancer.
B．It was mainly meant for cancer patients.
C．It might appeal more to viewers over 40.
D．It was frequently interrupted by commercials.
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单项选择题
In the third paragraph the writer states that
A．unhappy people always put themselves at rather unfavorable positions
B．unhappy people can be suitable to be leaders
C．unhappy people are always easy to become successful
D．unhappy people do not like to be mixed up with other people
单项选择题
A．investigationB．censusC．searchD．approach
A．investigation
B．census
C．search
D．approach
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