---This passage is difficult for me. Could you please explain it to me?---I’m afraid I hav

问题补充：

---This passage is difficult for me. Could you please explain it to me?

---I’m afraid I have to say sorry, but the book is my understanding.

A. beyond

B. over

C. above

D. off

答案：

(答案→)A. beyond

B. over

C. above

D. off

解析：可联系答.案.网客服索取。