按要求改写句子。
1. This is a bus. (改为复数形式)
    _______________ are _______________.
2. There are five women in the picture. (对划线部分提问)
    _______________ _______________ _______________ are there in the picture?
3. These are many dishes. (改为单数形式)
    _______________ _______________ a _______________.

【考点】复数名词,单数名词,指示代词,系动词,疑问词组

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