正确答案为：
6.we are going to（the park）to have a picnic.
（Where）（are）you going to have a picnic?
7.l‘d like （ten）books.
（How）（many）（books）would you like?
8.l want to buy（two kilos of）rice.
（How）（much）（rice）do you want to buy?
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另外千万别忘记采纳哟!