题目内容

Ellie_______ listening to music when the teacher spoke to her.

A. weren't
B. is
C. was

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I was taking a nap when someone_______ the door.

A. knocked
B. knocks
C. knocking

What_______ you_______ when Mom cooked last night?

A. was; doing
B. were; doing
C. are; doing

She_______ looking when we crossed the road.

A. weren't
B. wasn't
C. didn't

I was_______ in class at 3:00 p.m. yeasterday.

A. to study
B. study
C. studying

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