--Could you help me do some cleaning tomorrow?

--If I         ，I will do it．

A．am free                B．will be free              C．will have time         D．had time

—Could you help me do some cleaning tomorrow?

—If I         , I will do it.

     A、am free    B、will be free    C、will have time    D、had time

---Could you help me take these new books to the classroom?

---OK, I'll do it right now.

1. A.
   at that moment
2. B.
   at the moment
3. C.
   in a moment
4. D.
   a moment ago