_______in conversation,they didn't notice me entering the room.___英语解答

_______in conversation,they didn't notice me entering the room.
______in conversation,they didn't notice me entering the room.
1.engaged
2.engaging
3.engaged themselves
4.having engaged themselves
为何不选原因详解

人气：339 ℃　时间：2020-05-20 00:37:40

解答

选 1.engaged Engaged in conversation,they didn't notice me entering the room.他们忙着说话,都没注意我进屋了.engaged 形容词,从事...的;忙於...的[(+in/on)],后面不用加反身代词,所以2,3,4都不对.例如:He is en...