在我20岁生日那天,在我不知情的情况下,同学们给我一个很大的惊喜.这句英语怎么说

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在我20岁生日那天,在我不知情的情况下,同学们给我一个很大的惊喜.这句英语怎么说

On my 20 years birthday,my classmates gave me a big surprise which is unknow to me.On my 20 years birthday,my classmates gave me a big surprise without informing me.我比较喜欢这种knowledge不好.是On 不...