题目内容
从所给的四个选项中选择最佳答案
It is more than fifteen years ______ I last heard of him.
[ ]
A.that B.when C.since D.before
答案:C
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题目内容
从所给的四个选项中选择最佳答案
It is more than fifteen years ______ I last heard of him.
[ ]
A.that B.when C.since D.before