角膜接触镜（）。

A.使物像放大1％～2％

B.使物像放大3％～6％

C.使物像放大7％～12％

D.使物像放大13％～19％

E.使物像放大20％～35％

---The vase cost me almost 100 yuan.

---Well, it was crazy of you to spend so much money _____you could buy a much         cheaper one.

A．while

B．if

C．because

D．when