单项选择题


A．differently
B．happily
C．sadly
D．excitedly
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单项选择题
A．BeforeB．SinceC．WhileD．When
A．Before
B．Since
C．While
D．When
单项选择题
A．discouragingB．encouragingC．surprisingD．interesting
A．discouraging
B．encouraging
C．surprising
D．interesting
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