单项选择题


A．Because
B．As
C．For
D．Since
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单项选择题
A．look forB．look inC．look afterD．look through
A．look for
B．look in
C．look after
D．look through
单项选择题
A．fromB．goC．backD．come
A．from
B．go
C．back
D．come
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