问题描述：
The question came up at the meeting ______ we had enough money for our research.[ ]
The question came up at the meeting ______ we had enough money for our research.
[ ]
A.if
B.what
C.that
D.whether
为什么选D?请解释理由.
The question came up at the meeting ______ we had enough money for our research.
[ ]
A.if
B.what
C.that
D.whether
为什么选D?请解释理由.
问题解答：
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