---It cost me 30 yuan to get here.

---Well, it was crazy of you to take a taxi        you would come by bus as well.

---It cost me 30 yuan to get here. 

---Well, it was crazy of you to take a taxi        you would come by bus as well.

1. A.
   unless
2. B.
   when
3. C.
   if
4. D.
   because

—It cost me 30 yuan to get here.

       —Well, it was crazy of you to take a taxi _______ you could come by bus as well.

       A．while       B．if      C．when D．because

-- It cost me 30 yuan to get here.

--Well, it was crazy of you to take a taxi ________ you could come by bus as well.

A. while                      B. if                    C. because             D. when