问题描述：
最好有解析.
—Which one is _________,the big one or the small one?
—The small one.
[ ]
A.cheap
B.cheaper
C.expensive
D.expensiver
选什么
—Which one is _________,the big one or the small one?
—The small one.
[ ]
A.cheap
B.cheaper
C.expensive
D.expensiver
选什么
问题解答：
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