1.They finished all their work and then left the office
= before...
2.My brother began to work for the company 2 year ago
= my brother has...
3. John isn't on the phone. This makes it difficult to contact him
=John isn't on the phone...
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1 câu trả lời 3598
before they left office, they had finished all their work
My brother has working for the company for 2 years
John isn't on the phone so it's difficult to contact him
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