Bài tập Tiếng Anh thì hiên tại hoàn thành
1) We (study)......................... a very hard lesson the day before yesterday
2) We (study).......................... amost every lesson in this book far...............
3) We (study)........................... that television program on television last night............
4) We (watch)............................ an interesting program on television last night.................
5) My wife and I........................... (travell) by air many times in the past
