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：本题考查动词短语。 句意：我们十分尊重Mr. Black，因为他总是信守原则。live up to 意为“遵守，实践（诺言，原则）”。