Question

I know the boy ____ our teacher is talking. A.who B.to who C.to whom D.to that

选哪个，为什么？

Answer 1

C
定语从句‘
由于talk to sb
做的是宾语
所以用whom
不要忘记介词整个就是 to whom
希望对你有帮助

Answer 2

C

Answer 3

take to 词组，前置

Answer 4

C.to whom
应该用宾格

Answer 5

C

Answer 6

C
our teacher 是主语，is talking 是谓语，所以从句缺少宾语，缺少主语用who,缺少宾语用whom,答案就显而易见了~~