优题课 - 聚名师,上好课(www.youtike.com)
  首页 / 试题 / 高中英语 / 试题详细
  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:1753

Before going abroad he devoted all he could _______ his oral English.

A.improve B.to improve
C.improving D.to improving
登录免费查看答案和解析

Beforegoingabroadhedevotedallh