单项选择题

A．Its seaport.
B．Its culture.
C．Water transportation.
D．Its safety.
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问答题
在许多世纪里，它使南北美洲未被欧洲人发现。
单项选择题
A．Mary was in her sister’s room.B．Mary and her sister were in the room.C．Mary and her sister shared one room.D．Mary’s sister went into Mary’s room,
A．Mary was in her sister’s room.
B．Mary and her sister were in the room.
C．Mary and her sister shared one room.
D．Mary’s sister went into Mary’s room,
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