Charlie said, "I don’t know what Fred is doing".
A. He said that he doesn’t know what Fred is doing.
B. He said that he didn’t know what Fred is doing.
C. He said that he doesn’t know what Fred was doing.
Chọn đáp án D
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Charlie said, "Tom had an accident last week but he wasn't injured".
Charlie said, "I saw jack at a party a few months ago and he seemed fine".