A．Friends.B．Father and daughter.C．Clerk and customers.D．Teacher and student.
A. Friends.
B. Father and daughter.
Clerk and customers.
D. Teacher and student.
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A．He loves the characters in the program.B．He is interested in the idea of traveling t
A. He loves the characters in the program.
B. He is interested in the idea of traveling through the universe.
C. He considers the life form. in the program is great.
D. All of the above.
A．They are studying why people expend calories.B．They are studying how long people sho
A. They are studying why people expend calories.
B. They are studying how long people should spend on exercising.
C. They are studying what is the most important way of keeping fit.
D. They are studying why some people get fat and others don't.
A．15.B．20.C．30.D．Uncountable.
A. 15.
B. 20.
C. 30.
D. Uncountable.
Opponents of smoking financed the UCSF study.
A. Y
B. N
C. NG
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