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:中等
  • 人气:864

Life is like riding a bicycle. ________ your balance, you must keep moving.

A.Keeping B.To keep
C.Keep D.Having kept
登录免费查看答案和解析

Lifeislikeridingabicycle.yourb