We have a high regard for Mr. Black because he always tries to his principles. A. live up

问题补充：

We have a high regard for Mr. Black because he always tries to his principles.

A. live up to

B. look forward to

C. catch up with

D. put up with

答案：

(答案→)A. live up to

B. look forward to

C. catch up with

D. put up with

解析：短语辨析。A不辜负；B盼望；C追上，赶上；D认识；结合句意可知A正确。句意：我们对布莱克先生有很高的评价，因为他总是坚持原则。