What _ boy he is Mrs Lu was very grateful _his help.A.a kind; to B.kind; to C.a kind; at D.kind; at

问题描述:

What _ boy he is Mrs Lu was very grateful _his help.A.a kind; to B.kind; to C.a kind; at D.kind; at

A.a kind; to
boy是可数名词,前面要用a
be grateful to