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单项选择题
A.hear
B.heard
C.to hear
D.hearing
单项选择题
A.where
B.to which
C.which
D.for which
单项选择题
A.in front of
B.in the front of
C.at the back of
D.at the beginning of
单项选择题
A.has
B.was
C.are
D.were
单项选择题
A.understand
B.understanding
C.to understand
D.understood
单项选择题
A.took good care of
B.was taken good care
C.was taken good care of
D.was taking good care