单项选择题

Sign language is said to be very vivid and exact and can be used internationally except for （）

A．spelling
B．ideas
C．whole words
D．expressions

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填空题
A．boat B．broad C．goal D．road
单项选择题
Defied in the 5th paragraph probably means （）.

A．doubted
B．gave proof to
C．challenged
D．agreed to
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