单项选择题

A．A businessman in a store.
B．A wander in the street.
C．Amateur detective.
D．A man with plain clothes.
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单项选择题
A．The man should try to be more understanding.B．The man’s wife should be more understanding.C．The man’s negative attitude may be derived from his childhood.D．The pessimism of man’s wife may be the result of her past experiences.
A．The man should try to be more understanding.
B．The man’s wife should be more understanding.
C．The man’s negative attitude may be derived from his childhood.
D．The pessimism of man’s wife may be the result of her past experiences.
填空题
Researches in the wild field evaluating the two most common Bt corn plants showed that the toxin absorbed was too ______ .
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