单项选择题

Who is the first President to live in White House

A．Theodore Roosevelt.
B．John Adams.
C．George Washington.
D．Thomas Jefferson.
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单项选择题
The discovery of a new type of ceratopsian dinosaur suggests ceratopsians ______.
A．migrated to North America around 70 - 80 million years ago
B．arrived in Asia from North America about 90 million years ago
C．originated in Asia and later migrated to North America
D．could have moved to Asia from North America long ago
单项选择题
The grapes are harvested on a date that ______.
A．may vary.
B．is traditionally set.
C．depends on the official approval.
D．is determined by availability of pickers.
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