问题描述：
I can't tell you now—I'll have to （）it. A.think o
I can't tell you now—I'll have to （）it.
A.think of B.think about C.think over D.think out
I can't tell you now—I'll have to （）it.
A.think of B.think about C.think over D.think out
问题解答：
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