单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．Establish his laboratory.
B．Have a vacation.
C．Study deafness among the families.
D．Visit members of his family.
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单项选择题
A．They are available year-round.B．They are often filled by tourists.C．They often involve a great deal of physical labor.D．They are restricted to high school students.
A．They are available year-round.
B．They are often filled by tourists.
C．They often involve a great deal of physical labor.
D．They are restricted to high school students.
单项选择题
A．300,000.B．400,000.C．500,000.D．600,000.
A．300,000.
B．400,000.
C．500,000.
D．600,000.
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