put the verbs into the correct tense ( simple past ỏ past progressive )

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`13` was doing , visited

`14` was , saw

`15` didn't understand , were talking

`-` Exercise 8 :

`1` got , was shining

`2` was

`3` decided

`4` went

`5` was cycling , saw

`6` was mowing , was picking

`7` appeared , started

`8` noticed , told

`9` was raining , was sitting

`10` came

`11` thanked , moved

`-` CT :

While + S + was/were + V-ing , S + was/were + V-ing - 2 hđ xảy ra ||

While + S + was/were + V-ing , S + V2/V-ed - diễn tả 1 hđ đang diễn ra thì 1 hđ khác chen vào

When + S + was/were + V-ing , S + V2/V-ed - diễn tả 1 hành động đang diễn ra thì có 1 hđ khác chen vào )

When + S + V2/V-ed , S + V2/V-ed - diễn tả 2 hđ xảy ra nối tiếp