练习册

  • 练习册
  • 试题
    精英家教网 > 初中英语 > 题目详情
    Trees can help ______ the air to keep it ______.

    A: clean, clean
    B: cleaning, cleaning
    C: to clean; cleaning
    D: cleaning; clean
    A
    请在这里输入关键词：
    相关习题

    科目：初中英语 来源：期末题 题型：单选题

    Trees can help ______ the air to keep it ______.
    [     ]
    A: clean, clean
    B: cleaning, cleaning
    C: to clean; cleaning
    D: cleaning; clean

    查看答案和解析>>


    同步练习册答案