Nhờ mn giúp em ạ. Em cảm ơn 
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forgotten to give her the exact address.
VII. Underline and correct the mistakes.
1. After Columbus discovered America, he had returned to Spain.
2. By the time he flew to London, he visited the UK three times.
3. The firefighters evacuated the victims when the building collapsed..
4. Eleanor opened the locked door as soon as she finds the key.
5. We weren't hungry because we had some light snacks already.
6. They collected glass bottles, and then they had recycled them.
C. di
had visited A. I
found
7. I was cleaning the windows as the postal worker rang the doorbell. When
8. They gone for a sightseeing tour once the bus arrived.
9. When dad was mowing the lawn, mom was picking some roses.
10. Who did compose the Moonlight Sonata?
Went
C.
Ali-
F