the two wen were ______ pleased to see each other that they forgot everything.A.so B.too C.very为什么选A呀?这句话里有to和that怎么区分是用too还是so?

the two wen were ______ pleased to see each other that they forgot everything.A.so B.too C.very为什么选A呀?这句话里有to和that怎么区分是用too还是so?
the two wen were ______ pleased to see each other that they forgot everything.A.so B.too C.very
为什么选A呀?这句话里有to和that怎么区分是用too还是so?

the two wen were ______ pleased to see each other that they forgot everything.A.so B.too C.very为什么选A呀?这句话里有to和that怎么区分是用too还是so?
这里用so,因为后面有that.这是个典型的so...that句型.
前面有to see each other有点迷惑性,但to see each other不是pleased的结果,所以不能用too.

so...that固定短语。意为：如此。。。以至于。too...to 太。。。而不能

固定用法 so ……that+从句 ……如此……以致……；
而too ……to do ……‘ 太……而不能……’
故正确的是A

so的程度比too要弱，so…that表示太…以至于

这里主要是句子的意思，so.......that,“”如此……以致于”，翻译为这两个人对遇见对方很高兴以致于忘了一切