用适当的句子补全对话

用适当的句子补全对话
A: Hey, Zhanghui. Have you enjoyed your time in the factory?
B: ____________________________________. I like the factory.
A: ___________________________________________________?
B: Since four years ago.
A: ______________________________________________________?
B: Everyone here is friendly. We always help each other.
A: ________________________________________________?
B: Once or twice a year. But this year I’m very busy. I haven’t been back to my hometown.
A: What’s the special place there?
B: There is a river.
A: A river? Can you swim in it?
B: Yes. ________________________, but now I don’t have time.
A: Thank you very much.
B: Not at all.