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Ответ:

Why haven't you called the doctor yet?
Have you ever been to the Bahamas?
I have just read your e-mail.
We haven't met since the summer festival.
The manager still hasn't decided what to do.
Have you seen him recently?
They have had their house for two and a half years.
Dan has never climbed a mountain.
I have written an article about drug addiction but I still have to write one about tourism.
Prices have gone up lately.