题目内容
（请给出正确答案）
Halley made his discovery ______.
A．by doing experiments
B．by means of his own careful observation
C．by using the work of other scientists
D．by chance
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更多“Halley made his discovery ____…”相关的问题
Halley made a surprising, but correct prediction in the year ______.
A．1704
B．1705
C．1706
D．1707
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
A.With
B.For
C.Under
D.On
His remarks finally ______ me that I had made the right decision.
A．assured
B．ensured
C．reassured
D．insured
We all ______ the achievements he has made in his experiments.
A．admire
B．adopt
C．advise
D．adjust
A.put up
B.found up
C.made up for
D.made up
A.invented
B.created
C.discovered
D.made
A.it
B.this
C.that
D.them
A.such a
B.so a
C.so
D.such
