--How about the book you are reading now?Excellent indeed. You can find many pr

问题补充：

----- How about the book you are reading now?

----- Excellent indeed. You can find many problems we have come across in it.

A. covered

B. covering

C. are referred

D. referred

答案：

(答案→)A. covered

B. covering

C. are referred

D. referred

解析：考查非谓语动词。句中covering作宾语补足语，与宾语many problems是主动关系。句意：——你现在看的这本书怎么样？——真好！它涉及/讲了我们学习过程中的很多问题．