单项选择题

A．develop
B．improve
C．become
D．turn
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单项选择题
A．BecauseB．ForC．WhileD．When
A．Because
B．For
C．While
D．When
单项选择题
A．viewedB．measuredC．gotD．found
A．viewed
B．measured
C．got
D．found
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