问题补充：
This problem is difficult .
A. so; that few of us can do
B. so; that few of us can do it
C. too; for anyone of us to do
D. too; for anyone of us to do it
答案：
A. so; that few of us can do
(答案→)B. so; that few of us can do it
C. too; for anyone of us to do
D. too; for anyone of us to do it
解析：本题考查so…that…的用法。anyone 不与of连用；选项A that few of us can do中do没有宾语。
