he was heard_____in the next room.--to sing--sing--sings--sang_英语解答

he was heard_____in the next room.
--to sing
--sing
--sings
--sang

人气：396 ℃　时间：2019-12-06 03:08:52

解答

to sing
heard的用法是
主动:heard sb doing sth
被动:be heard to do
这里是被动,意思为他被听到在隔壁房间唱歌