单项选择题

Millions of people in the United States suffer from () back pain that comes from sitting too long at a desk.

A. chronic
B. casual
C. catastrophic
D. elastic

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单项选择题

Paul is an () worker, and rarely does well in examinations. However he often refuses our help.

A. errant
B. erroneous
C. erratic
D. exotic

单项选择题

To () the structural imbalances in the budget, and also in the economy the Administration has given its support to a constitutional amendment.

A. relinquish
B. remedy
C. compensate
D. redress

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