Answer keys of exercises of past perfect
Fill in the gaps using the past simple or the past perfect
(Hãy điền vào chỗ trống bằng quá khứ đơn hay quá khứ hoàn thành)
- He (be) was/ had been a waiter before he (become) became a manager.
- I (feel) felt a little better after I (take) took/ had taken the medicine.
- I was late. The teacher (give, already) had already given a test when I (get) got to class.
- They (leave) left the village when they (collect) collected/ had collected enough data.
- By the time class (be) was over, the rain (stop) had stopped .
- Class (begin, already) had already begun by the time I (get) got there, so I (take, quietly) quietly took a seat in the back.
- Dinosaurs (become) had become extinct by the time human kind (appear) appeared .
- I (see, never) had never seen any of Picasso’s paintings before I (visit) visited the art museum.
- I almost missed my plane. All of the other passengers (board, already) had already boarded by the time I (get) got there.
- Yesterday at a restaurant, I (see) saw an old friend of mine. I (see,not) had not seen her in years. At first, I (recognize, not) did not recognize her because she (lose) had lost at least 20 kilos.
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