单项选择题

A．Just five minutes.
B．Slightly less than an hour.
C．Between one and two hours.
D．A little more than two hours.
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单项选择题
A．He can’t find his office key.B．He has misplaced some exams.C．He’s unable to talk.D．He doesn’t like his classroom.
A．He can’t find his office key.
B．He has misplaced some exams.
C．He’s unable to talk.
D．He doesn’t like his classroom.
单项选择题
A．To see how certain chemicals produce different flavors.B．To determine if a person can distinguish salty and sweet solutions.C．To map the location of taste buds.D．To count the number of taste buds.
A．To see how certain chemicals produce different flavors.
B．To determine if a person can distinguish salty and sweet solutions.
C．To map the location of taste buds.
D．To count the number of taste buds.
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