单项选择题

The scientist Galileo claimed that the earth ______ around the sun.

A. moves
B. moved
C. is moving
D. was moving
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单项选择题
How many days will the Oktoberfest last
A. 14 days.
B. 15 days.
C. 16 days.
D. 17 days.
单项选择题
In the last four paragraphs, the writer seems to suggest that one should ______.
A. not be honest on the net
B. be careful about the online friends
C. make friends with those you trust
D. believe nobody on the net
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