单项选择题
63()
A.preserves
B.protects
C.prevents
D.detects
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单项选择题
He gave me some very ______ advice on buying a house.
A.precious
B.expensive
C.wealthy
D.dear
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单项选择题
Such an error ______ this can be avoided, if you pay close attention to it.
A.like
B.for
C.as
D.with
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