补全对话，再仿写。
1.
A: What is this?
B: ________________________
A: How much is it?
B: _________________________
2.
A: What are they?
B: ________________________
A: How much are they?
B: _________________________
3.
A: __________________________
B: ________________________
A: _________________________
B: ________________________
4.
A: __________________________
B: ________________________
A: _________________________
B: ________________________
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