Question

【题目】-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

Answer 1

【答案】A

【解析】句意——你现在正读的那本书怎么样？——真的非常好，你会发现我们遇到的许多问题都被包含其中。we have come across是定语从句，修饰many problems。problems和cover之间构成被动关系。