问题
选择题
More patients ___________ in hospital this year than last year.
A．treated
B．have treated
C．had been treated
D．have been treated
答案
答案：D
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。