单项选择题


A．problem
B．position
C．food,
D．ceiling
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单项选择题
A．holeB．zooC．roomD．museum
A．hole
B．zoo
C．room
D．museum
单项选择题
If you want _________, you should speak slowly and clearly to the listeners.
A．to be understood
B．to understand it
C．understanding
D．to understood
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