单项选择题

Copernicus pointed out that the earth ______ round the sun.

A. had moved
B. move
C. has moved
D. moves
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单项选择题
The dog ______ us coming. He ______ to meet us.
A. hears, runs
B. is hearing, runs
C. is hearing, is running
D. hears, is runing
单项选择题
There ______ Tony, the famous tennis player.
A. came
B. is coming
C. has come
D. comes
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