问题补充：
----- When shall we have a holiday?
------- Oh, forget it. Now there are many things in the company.
A. remained to solve
B. remaining to be solved
C. remaining to solve
D. remained to be solved
答案：
A. remained to solve
(答案→)B. remaining to be solved
C. remaining to solve
D. remained to be solved
解析：考查非谓语动词。many things 与remain为主谓关系用现在分词作定语，things是被解决用过去分词。“我们什么时候休假？”“得了吧，公司里有许多事情有待解决。
