本帖最后由 hua_chris 于 2013-8-6 14:25 编辑 2 x* L: N* m8 R+ P; O* y
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Last night, I took part in a party. 3 ^, n* V6 s; U: D3 sLast night, I was taking part in a party.
to me, all 4 are ok and acceptable. depend on where and how you are going to use them. picking one over another doesn't make the sentence any more or less sophisticated.