---You don't do some jogging, do you?

---No, I _______, but now I _______ climbing mountains to keep fit .

1. A.
   used to; am used to
2. B.
   am used to; used to
3. C.
   was used to; used to
4. D.
   used to; used to

—You don't do some jogging, do you?

—No, I ________, but now I ________ climbing mountains to keep fit .

[　　]

A．used to; am used to

B．am used to; used to

C．was used to; used to

D．used to; used to