His health is improving. I'm sure he will come back to work soon.A. graduallyB. frequently

问题补充：

His health is improving. Im sure he will come back to work soon.

A. gradually

B. frequently

C. fluently

D. finally

答案：

(答案→)A. gradually

B. frequently

C. fluently

D. finally

解析：考查副词：A. gradually逐渐地，B. frequently频繁地，C. fluently流利地，D. finally最后，句意：他的健康在逐渐改善，我肯定他很快就能来上班了。选A。