单项选择题

At first the captain didn’t worry because the ship was said to be _______.

A．unsinkable
B．perfect
C．unprepared
D．unusually
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单项选择题
How long did it take Byrd and his colleagues to fly from Little America to the South Pole and back
A．15 hours.
B．16 hours.
C．18 hours.
D．19 hours.
单项选择题
Kuwaitis can enjoy _______.
A．free college education
B．free health care
C．free world traveling
D．free hotel rooms
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