单项选择题

The hero in the book was______ by his enemies and left in a gas filled room, but he managed to escape.

A．bound up
B．tied up
C．locked up
D．knocked over
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单项选择题
The United Nations' experts are supposed to______.
A．construct strong buildings
B．put forward proposals
C．detect disastrous earthquakes
D．monitor earthquakes
单项选择题
The destruction of Agadir is an example of______.
A．faulty building construction
B．an earthquake’s strength
C．widespread panic in earthquakes
D．ineffective instruments
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