Healsotoldusthatthebestway 

问题详情：

He also told us that the best way  ____ _  respect was to devote ourselves  _____  study and achieve high grades.

  A. to earn; at    B. earning; to      C. earn; to      D. to earn; to

【回答】

D

知识点：非谓语动词

题型：选择题