I'm sorry to hear that Peter and Jack have_____. They were such good friends. 选什么,谢啦!A.fallen through B.dropped offC.fallen out D.dropped out

I'm sorry to hear that Peter and Jack have_____. They were such good friends. 选什么,谢啦!A.fallen through B.dropped offC.fallen out D.dropped out
I'm sorry to hear that Peter and Jack have_____. They were such good friends. 选什么,谢啦!
A.fallen through B.dropped off
C.fallen out D.dropped out

I'm sorry to hear that Peter and Jack have_____. They were such good friends. 选什么,谢啦!A.fallen through B.dropped offC.fallen out D.dropped out
选C,掉队