单项选择题

A) would C) used to
B) could D) was used to

A．would
B．could
C．used to
D．was used to
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单项选择题
A) like before C) like alwaysB) as usually D) as usual
A．like before
B．as usually
C．like always
D．as usual
单项选择题
A) valuable C) unusualB) important D) serious
A．valuable
B．important
C．unusual
D．serious
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