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B .
C .
⑴
She's watching TV, A. but it starts to snow.
⑵
Ann is talking to her friend, B. but the bell rings.
⑶
He's walking in the park, C. but the telephone rings.
⑷
Jack is crossing the street, D. but his sister starts to sing.
⑸
He's reading a book, E. but a car comes.