The man is notreliable for he seems frankness.A to lack in B. to be lacking in C. to la

问题补充：

The man is notreliable, for he seems frankness.

A to lack in B. to be lacking in C. to lack of D. to be lacking of

答案：

解析：考查lack的用法，lack做动词时，可以用be lacking in，lack for，lack sth，做名词时，用lack of sth，因为seem后面接to do，所以选B，句意：这个人不可靠因为他好像缺乏诚信。选B。