单项选择题

A．He can talk to her a few minutes later.
B．He must wait for a long time.
C．He’’d better speak to her at once.
D．He can have a long talk with her.
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单项选择题
C
单项选择题
People should be able to come to a decision about ions in the air if they _______.
A．note their own reactions
B．move to a healthier, area
C．observe domestic animals
D．watch how wealthy people behave
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