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來源: 於 2010-12-07 13:17:18 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

I heard this sentence from new concept English book 1. Is conversation used as verb here?

or the "to" can be followed by a noun?

Thanks.

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Original:

It's our favorite subject of conversation.