He was admitted to a famous university,________ was obvious that his situation had gone beyond his parents’ expectations.A.whatB.itC.asD.and it为什么不选B?B和D的区别在哪里?

He was admitted to a famous university,________ was obvious that his situation had gone beyond his parents’ expectations.A.whatB.itC.asD.and it为什么不选B?B和D的区别在哪里?
He was admitted to a famous university,________ was obvious that his situation had gone beyond his parents’ expectations.
A.what
B.it
C.as
D.and it
为什么不选B?B和D的区别在哪里?

He was admitted to a famous university,________ was obvious that his situation had gone beyond his parents’ expectations.A.whatB.itC.asD.and it为什么不选B?B和D的区别在哪里?
,前后是两个完整的句子,连接两个句子需要连词.and就是充当连词

两个句子 用and连接 表递进