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Who has opened this box? I have.
The boy has gone to America.
They haven't had(eaten) dinner yet.
We haven’t received(got) a letter from him yet.
I have just had(eaten) lunch.
We have read this book many times.
Have you done your homework yet?
She has never been abroad(to a foreign country).
Tom has broken the window.
Have you ever been to that country?
She has lost her wallet(purse).
I have seen this movie before.