chia động từ trong ngoặc cho đúng với thì hiện tại hoàn thành hoặc quá khứ đơn
1.we (study)...........................avery hard lesson yesterday
2.we (study)...........................almost every lesson in this book so far
3.i (have)................................a little trouble with my car last week
4.we (watch).............................an interesting program on television last night
1, stuidied
2. have studied
3. had
4, wathched
1.We (study) studied very hard lesson yesterday
2.we (study) have studied almost every lesson in this book so far
3.I (have) had a little trouble with my car last week
4.We (watch) watched an interesting program on television last night