单项选择题

A．wonder
B．widen
C．wander
D．concentrate
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单项选择题
A．in a written formB．in a particular formC．in EnglishD．in general
A．in a written form
B．in a particular form
C．in English
D．in general
单项选择题
A．for a timeB．for some timeC．at a timeD．in a time
A．for a time
B．for some time
C．at a time
D．in a time
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