More patients in hospital this year than last year.A. treatedB. have treatedC. had been t

问题补充：

More patients in hospital this year than last year.

A. treated

B. have treated

C. had been treated

D. have been treated

答案：

A. treated

B. have treated

C. had been treated

(答案→)D. have been treated

解析：本题考时态语态，句中treat与patient连用，应是“治疗”的意思，故全句意为：今年到医院就医的病人比去年多。病人应被治疗，故需被动语态，且是今年（现在）的事，故选D，现在完成时的被动语态。