There is mistake in the four underlined parts of each sentences. Find the mistake. 1. We are waiting for Mike for the last two hours, but he still hasn't arrived. A. are waiting B. the last two C. but D. hasn't arrived 2. By the time he left the office, he have attended three meetings. A. By B. left C. have attended D. meetings 3. So far this weekend, the teachers are giving us a lot of homework every day. A. So far B. the C. are giving D. homework 4. By the end of the 20th century, scientists have discovered the cure for common cold. A. the end of B. 20th century C. have discovered D. for 5. When I arrived, they had waited for me. They were very angry with me. A. arrived B. had waited C. were D. with

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· 18:29 25/07/2021

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