◎ 题干
基本语法。
1. The streets here _____ (clean) by the cleaners every morning.
2. These flowers _____ (water) once every three days.
3. Many new things _____ (invent) by the scientists in the 20th century.
4. Yesterday a composition on protecting animals _____ ( write) by the students of our class.
5. The little girl had learned to play the piano  _____ the age of five.
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“基本语法。1. The streets here_____ (clean) by the cleaners every morning.2. These flowers_____ (water) once every three days.3. Many new things_____ (invent…”主要考查了你对  【被动语态】【一般现在时】【一般过去时】【介词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。