1. rewrite the followwing sentences
1) David had gone home before we arrived
after.............................................
2)we had lunch then we took a look around the shops
before........................................
3)the light had gone out before we got out of the office
when...................................
4) after she had explaned everything clearly , we started our work
by the time...........................
5) my father had watered all the plants in the garden by the time my mother came home
before........................
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Sinh Học lớp 12
