问题描述：
These two Christmas trees are of ___size,but the one they bought yesterday i
These two Christmas trees are of ___size,but the one they bought yesterday is maybe twice ___size of them.
A.the,the B.a,the C.a,a D.the,a
These two Christmas trees are of ___size,but the one they bought yesterday is maybe twice ___size of them.
A.the,the B.a,the C.a,a D.the,a
问题解答：
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