单项选择题

Since Xerox couldn't work smoothly, he assumed that someone had ______ with it.

A．scampered
B．pampered
C．hampered
D．tampered
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单项选择题
The two countries are obliged to abide by the international conventions and ______ of these chemical weapons under the convention.
A．impose
B．disclose
C．dispose
D．depose
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