单项选择题

—Beg your pardon, please. I didn't quite catch what you said.
—Oh, I just()to myself.

A. talked
B. am talking
C. was talking
D. had teen talked

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单项选择题
When the manager went to Canada on business, his()took over all his duties.

A. caretaker
B. officer
C. deputy
D. commander
单项选择题
When I got to the museum, I found it () with people.

A. crowded
B. crowding
C. have crowded
D. had crowded
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