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雷达卡
将下列句子翻译成中文
Have we ever met before?
We have already prepared for the party for a week.
Who have you met at the party?
My sister has sent him three letters by post.
I have been to the toilet.
How long have you stayed here?
Our teacher has already corrected our homework.
He has already taken away the key to the car.
Have you given your old books away?
My little brother has gone to bed.
Have you met the dentist?
They have
cooperated
with each other for five years.
My grandpa has gone to the park by ...
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