We often ___(go) swimming when we were young.
A. going
B. would go
C. were used to go
D. were going
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What ___you ___(do) at eight 8:00 last night?
A. were ....doing
B. did﹉....do
C. do...do
D. were...di
In the past 30 years, great changes ___(take place) in our country.
A. took place
B. take place
C. have taken place
D. were taking place.
Would you like __(work) with us in the next four years?
A. work
B. to work
C. worked
D. working
When she got home,she found that the daughter___(sleep).
A. sleep
B. was sleeping
C. slept
D. to sleep