I don't know what illness he suffered from,but I do renmenber he mentioned____in hospital last yearA.to have been B.to be C.having been D.be

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Idon''tknowwhatillnesshesufferedfrom,butIdorenmenberhementioned____inhospitallastyearA.tohavebeenB.to

I don't know what illness he suffered from,but I do renmenber he mentioned____in hospital last yearA.to have been B.to be C.having been D.be
I don't know what illness he suffered from,but I do renmenber he mentioned____in hospital last year
A.to have been B.to be
C.having been D.be

I don't know what illness he suffered from,but I do renmenber he mentioned____in hospital last yearA.to have been B.to be C.having been D.be
C,mention是动词,后面要加宾语,因此用having been形式.

A I guess. mention to do sth.