He ______the novel before.
A. has read
B. read
C. reads
D. had read
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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
You cannot find your tickets. I think _________.
A. you left them on the table
B. you had left them on the table
C. you did left them on the table
D. you leave them on the table
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