---Sorry I can’t work out this problem.-Try again please. It’s only difficult.A. a b

问题补充：

---Sorry, I can’t work out this problem.

---Try again, please. It’s only difficult.

A. a bit

B. a lot

C. very

D. much too

答案：

(答案→)A. a bit

B. a lot

C. very

D. much too

解析：词义辨析：a bit:表示一种很小的程度，一点；a lot :是非常多；very:很，非常；much too:太；非常。根据句意“再试一试，这个问题只有一点难度。”选A。