`=>` visited

- Thì QKD - last year

`=>` have visited

- Thì HTHT - four times

`=>` bought

- Thì QKD - two months ago

`=>` bought

- Thì QKD - Diễn tả một hành động đã xảy ra và kết thúc trong QK

`=>` have collected

- Thì HTHT

`=>` collected

- Thì QKD - when he was a child

`=>` has failed

- Thì HTHT - again

`=>` went

- Thì QKD - yesteday

`=>` have been

- Thì HTHT - three times

last year I ___visited ______hue (visit)

=> Sử dụng thì QKĐ (DHNB: last year)
they ___have visited ______ hue four times .(visit)

=> Sử dụng thì HTHH (DHNB: four times)
he___bought___a car two months ago (buy)

=> Sử dụng thì QKĐ (DHNB: ago)

they ____have bought___ a new house (buy)

=> Sử dụng thì HTHH
they___ have collect__thousands of cds .(collect)

=> Sủ dụng thì HTHH
he__collected___stamps when he was a child.(collect)

=> Sử dụng thì QKĐ (DHNB: was a child)
peter _failed ___ the exam again (fail)

=> Sử dụng thì QKĐ (DHNB: again)
yesterday I __went ___ to the supermarket but it was closed (go)

=> Sử dụng thì QKĐ (DHNB: yesterday)
they __have been __ to that supermarket three times .(be)

=> Sử dụng thì HTHH (DHNB: three times)