问题描述：
.It wasn’t until we had sat down to eat_______ we got back to the subject of Tom Holliday.
A.when\x05\x05\x05B.what\x05\x05\x05\x05C.that\x05\x05\x05\x05D.which
A.when\x05\x05\x05B.what\x05\x05\x05\x05C.that\x05\x05\x05\x05D.which
问题解答：
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