Do you remember ________ when the car accident happened?
A. what you were doing B. what were you doing
C. what you did D. what did you do
— I didn’t see you at the meeting yesterday. Why?
— I _____ for an important telephone call at that moment.
A. wait B. waited C. am waiting D. was waiting
—Linda, I called you this morning, but nobody answered the phone.
—I’m sorry. I ________ football with my friends then.
A. play B. played C. am playing D. was playing
What _________ when the earthquake happened on May 12th?
A. are you doing B. were you doing C. do you do D. did you do
Mary was listening to music while she _________ to school.
A. walked B. was walking C. is walking D. walks
We were reading the newspaper _______ suddenly the light went out (熄灭).
A. when B. while C. as D. /
