单项选择题


A．and
B．when
C．since
D．for
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单项选择题
A．looked intoB．looked upC．looked out ofD．looked at
A．looked into
B．looked up
C．looked out of
D．looked at
单项选择题
A．DuringB．AfterC．InD．On
A．During
B．After
C．In
D．On
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