Max is honest boy. He has useful book.A. an; anB. a; aC. a; anD. an; a

问题补充：

Max is honest boy. He has useful book.

A. an; an

B. a; a

C. a; an

D. an; a

答案：

A. an; an

B. a; a

C. a; an

(答案→)D. an; a

解析：句意：马克斯是一个诚实的男孩。他有一本实用的书。honest是以元音音素[?]开头，应用冠词an。useful是以辅音音素[ju]开头，应用冠词a。