单项选择题

One of the most obvious characteristics of the moon is the way in which it continuously changes __________ ．

A．in appearing
B．its appearance
C．are appearing
D．for appearance
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单项选择题
James Cook, __________ also discovered the Hawiian Islands．
A．by exploring the South Sea he reached Australia
B．explored the South Sea and reaching Australia
C．who explored the South Sea and reached Australia
D．explored the South Sea then reached Australia
单项选择题
The universe __________ we know it might have begun with a great explosion．
A．as
B．that
C．and which
D．and
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