选择合适的句子，补全对话。（有两项是多余的）
| A．What did you do yesterday? |
| B．Where did you go yesterday? |
| C．How many children were there at the party? |
| D．Yes, he did. |
| E．Why did you visit Mike? |
| F．No, they weren't. |
| G．How many children are there at the party? |
A:Hello, Liu Yun. ________
B:I visited Mike.
A:________
B:Because it was his birthday yesterday.
A:Did he have a birthday party?
B:________
A:________
B:There were fifteen children at the party.
A:Were Mike's parents at home?
B:________
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