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----- Nội dung dịch tự động từ ảnh -----
1. They once started these machines by hand.
They used to
2. Ile doesn't get up late anymore.
He
3. David had gone home before we arrived.
Atter
4. We had lunch then we took.a look around the shops.
Before
5. The light had gone out before we got out of the office.
When
6. After slie had explained every thing dearly, we started our work.
By the time
7. The building is very old. He lives there. (where)
8. I will tell you something. You didn"t know it before. (which)
9. I'll never forget the day. I met you then. (when)
10. I was cold. However. Tom still went swimming (although)
11. John is very sad. He fails the linal exam. (because)
12. He never lefi the house. He had been bom there. (where)
-The end-