1) I was sleeping on the bed ........ I heard the noise. a) when b) while c) who 2) .........she was cooking, her husband called her. a) who b) while c) when 3) ......the phone rang , she was having her breakfast. a) who b) while c) when 4) .........she was travelling on a train, she met him. a) when b) while c) when 5) .....I was making the bed, my mom entered the room a) while b) which c) when

When/while

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