单项选择题

This passage in general is about ______.

A．Halley and other scientists
B．the orbit of a comet
C．Newton and Halley
D．Halley and his discovery
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单项选择题
Halley made a surprising, but correct prediction in the year ______.
A．1704
B．1705
C．1706
D．1707
单项选择题
According to the passage, which one is NOT true
A．Newton figured out the orbit of the comet.
B．Halley figured out the orbit of the comet first.
C．Newton gave Halley some help.
D．Halley died before 1758.
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