问题
The country life we ______ The differences between rural and urban areas are disappearing
A:were used to have changed
B:used to change
C:used to changing
D:were used to has changed
B:used to change
C:used to changing
D:were used to has changed
正确答案是：
同类题型
dvanced world, ______ place where everyone enjoys his lifeand freedom.
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Then you usually lie there just ______ the ceiling, thinking about everything that could go wrong.