Tom (be) to Rio de Janeiro, Sydney, and London. * Tom have been to Rio de Janeiro, Sydney, and London. Tom has been to Rio de Janeiro, Sydney, and London. 3. They ( live ) in this city since 2016. * They has lived in this city for 20 years. They have lived in this city for 20 years. 4. How long you (learn) English? * How long have you learnt English? How long have you learn English? 5. I ( do ) homework for 30 minutes. * I do homework for 30 minutes. I have done homework for 30 minutes. Chia thì hiện tại hoàn thành ạ >.<

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