The girl _______ sing in the next room last Sunday

问题描述:

The girl _______ sing in the next room last Sunday
A.heard to
B.is heard to
C.was heard
D.was heard to

我觉得是D
last Sunday (上个星期六)说明了整个句子的时态,是过去式时态,谓语动词用was.
我记得一般感官动词后直接加动词原形,但被动语态时要加to,所以我觉得应该选D