⒈A: Why are you playing football?
B: Because it's sunny.
⒉A: Why are you eating an ice cream?
B: Because it's very hot.
⒊A: Why are you wearing a coat?
B: Because it's very cold.
⒋A: Why do you buy a cake?
B: Because it's my birthday today.
⒌A: Why are you staying at home?
B: Because it's raining.
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⑶
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⑸
A. B. C. D. E.