— Why do you work so hard?

—________my parents’ expectations.

A．To make full use of

B．Meeting the demand of

C．To live up to

D．Putting up with

链条炉要求燃料中灰分熔点不要太低，应（）。

A.高于1100°C

B.不超过1200°C

C.高于1200°C

D.等于1200°C