I find that the machine ________.
A. is repaired
B. will be repaired
C. was repaired
D. has been repaired
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He ______the novel before.
A. has read
B. read
C. reads
D. had read
So far I ________ to Beijing.
A. had gone
B. did go
C. have been
D. has been
It is just nine o'clock. The plane__________five minutes ago.
A. had taken off
B. has taken off
C. took off
D. takes off
Copernicus maintained that the earth _________round the sun.
A. moved
B. moves
C. has moved
D. is moved
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