1.Poets /have mentioned/ the “ao dai” /in poems for centuries.
->The “ao dai” has been
2.My parents gave me 2 tickets to the concert last week
-> I …………………………………………………………………………………………………
3. People all over the world speak English.
-> English …………………………………………………………………………………………..
4. Minh last wrote to his pen pal five months ago.
-> Minh hasn’t …………………………………………………………………………………….