We have a high regard for Mr. Smith because he always tries to his principles.A. look forw

问题补充：

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

A. look forward to

B. live up to

C. keep up with

D. put up with

答案：

A. look forward to

(答案→)B. live up to

C. keep up with

D. put up with

解析：

这题考查词组辨析，look forward to 渴望live up to符合、达到…期望 keep up with 跟上put up with容忍。结合句意：我们钦佩斯密斯先生，因为他一向总是坚持原则。所以选B。