Past simple or present perfect:

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VII. Past simple or present perfect:
1) We (study)................a very hard lesson the day before yesterday
2) We (study)..........
3) We (never watch).
4) We (watch)...........
5) My wife and I......
6) My wife and I (travel)..
.......almost every lesson in this book so far
......that television program......
.....an interesting program on television last night..........
...(travel) by air many times in the past
to Mexico by air last summer
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