Mr. Black is a careful and experienfed engineer, so he is often to finish some challenging tasks.
A. appreciated
B. approached
C. appointed
D. agreed
网友回答
A. appreciated
B. approached
(答案→)C. appointed
D. agreed
解析：动词用法。A欣赏；B靠近；C任命；D同意；Appoint sb to do sth…任命某人做某事…；句意：布莱克先生是一个细心有经验的工程师，所以他经常被任命去完成一些有挑战性的任务。