句型转换。
1. This is a bus. (变复数句)
____________________________________________________.
2. This is a child. (变复数句)
____________________________________________________.
3. Here are three cars. (变单数句)
____________________________________________________.
4. These are many boxes. (变单数句)
____________________________________________________.

【考点】复数名词,单数名词,指示代词,系动词

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【解答】请登陆后查看