Question

It's time ________ go to work.

1. A.
   of us to
2. B.
   for we to
3. C.
   we will
4. D.
   for us to

Answer 1

D
It's time+for/of+sb.+to do sth. 是固定结构。For与of的区别在于：of表示某人或某物本身具有特质。For表示外在属性。如：It's very kind of you to help me。