单项选择题

Questions 19 to 21 are based on the passage you have just heard.

A．They were just big toys for children.
B．They were not so important.
C．They were the most popular form of transportation.
D．They were very attractive.
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单项选择题
A．Urban History.B．Architecture.C．Fine Arts.D．Urban Design.
A．Urban History.
B．Architecture.
C．Fine Arts.
D．Urban Design.
单项选择题
A．An experiment in Antarctica.B．The breaking-off of part of the Larsen Ice Shelf.C．The formation of the Larsen Ice Shelf.D．An expedition in Antarctica.
A．An experiment in Antarctica.
B．The breaking-off of part of the Larsen Ice Shelf.
C．The formation of the Larsen Ice Shelf.
D．An expedition in Antarctica.
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