单项选择题

Diabetes is now the nation's third ______ health problem, after cancer and heart disease.

(A) significant
(B) more significant
(C) most significantly
(D) most significant

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单项选择题

The customer relations team aims to ______ all complaints as quickly and effectively as possible.

(A) erase
(B) resolve
(C) contribute
(D) retain

单项选择题

Thanks to the new online system, employees can order office stationery ______ rather than going through the office manager.

(A) it
(B) itself
(C) them
(D) themselves

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