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7 tháng 9 2020

1.We ( studied )..studied....a very hard lesson the day before yesterday........

2.We (have studied).havestudied......almost every lesson in this book so far......

3.We (watched).watched.....an interesting program on TV last night......`

4. We ( have never watched)...have never watched...that TV program........

5.My wife and i ....had travelled..(had travelled ) by air many times in the past

6.My wife and i (travelled)....

1.We ( studied )......a very hard lesson the day before yesterday........

2.We (have studied).......almost every lesson in this book so far......

3.We (watched)......an interesting program on TV last night......`

4. We ( have never watched)......that TV program........

7.I ( have read)..have read....that novel by Hemingway sevaral times before

8.I (read )...have read.. that novel again during my last vacation

9. I (had)...had...a little trouble with  my car last week.

10.However , i (have).have....no trouble with my cảr since then