English is ____ a bridge to so____knowledgeI found _____too hard to learn English grammer.A.that B.it c.this D.that's要理由

问题描述:

English is ____ a bridge to so____knowledge
I found _____too hard to learn English grammer.
A.that B.it c.this D.that's
要理由

d

选B

D.that's
too hard to 太难而不能.用that,this要加句子吧.
用B的话,肯定要加动词,也就是用it is.

it