单项选择题

_____ their country has plenty of oil, ours has none.

A．While
B．Where
C．When
D． Unless
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单项选择题
This is much ____ to the one I bought last week.
A．worse
B．lower
C．inferior
D． equal
单项选择题
Can you ____ the three mistakes in this paragraph
A．turn out
B．bring out
C．call out
D．pick out
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