—Tony said he could fix my bicycle, but I really doubt it.

—_______. He’s very good at this sort of thing.[ ]

A. Don’t worry

B. I couldn’t agree more

C. Of course

D. A piece of cake

秦岭——淮河一线，大致与我国多少毫米的年降水量线和1月平均气温多少摄氏度的等温线相吻合[ ]

A．800mm年降水量线，0°C等温线

B．400mm年降水量线，5°C等温线

C．800mm年降水量线，5°C等温线

D．600mm年降水量线，-5°C等温线