微信刷题,考证常用
  • 试题题型【单项选择题】
试题内容
He had learned 200 words _____the end of last week.
  • A. until
  • B. by
  • C. for
  • D. at
  • 参考答案:B
  • 解题思路:by the end of 到… 停止