---How about going out for a walk with us?
---I wish I could,           I have to finish my homework first.

 ---How about going out for a walk with us?

  ---I wish I could, ____I have to finish my homework first.

  A. and    B. so    C. but    D. or

---How about going out for a walk with us?

---I wish I could, ______ I have to finish my homework first.

1. A.
   and
2. B.
   so
3. C.
   but
4. D.
   or

---How about going out for a walk with us?
---I wish I could,______I have to finish my homework first.

1. A.
   so
2. B.
   and
3. C.
   but
4. D.
   or