The question is _________ .
A.so hard for us to understand it |
B.too hard for us to understand it |
C.too hard for us to understand |
D.so hard for us to understand |
The question is _________ .
A.so hard for us to understand it |
B.too hard for us to understand it |
C.too hard for us to understand |
D.so hard for us to understand |