单项选择题

Professor Smith is always very ______ to the reaction of the audience when he gives lectures.

A．sentimental
B．sensitive
C．sensible
D．positive
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单项选择题
Nobody but a young woman ______ the airplane crash.
A．endured
B．rejected
C．survived
D．lived
单项选择题
______, we keep records on all the experiments so that we may have enough data.
A．As a whole
B．As a rule
C．On the average
D．By all means
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