单项选择题


A．carefully
B．passively
C．attentively
D．permanently
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单项选择题
A．learningB．scanningC．listening toD．understanding
A．learning
B．scanning
C．listening to
D．understanding
单项选择题
A．withB．onC．deal withD．concerning with
A．with
B．on
C．deal with
D．concerning with
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