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II. There is mistake in the four underlined parts of each
sentences. Find the mistake.
1. The apartment was hot when I got home, so I was
turning on the air conditioner.
2. We are waiting for Mike for the last two hours, but he
still hasn't arrived.
3. Tom wants to get married, but he doesn't meet the
right person yet.
4. By the end of the 20th century, scientists have
discovered the cure for common cold.
5. I saw that movie three times, and now I want to see it
again.