________ the story is short and there are no new words in it, it is difficult to understand.

1. A.
   But
2. B.
   Though
3. C.
   And
4. D.
   For

______the story is short and there are no new words in it , it is difficult to understand．

A． But 　　　B．though 　　　C． And 　　　D． For       

______ the story is short and there are no new words in it ,it is difficult to understand.

A. But

B. Though

C. And

D. For