13 tháng 10 2021 lúc 20:33
1 has just been explained in class by the teacher
2 be fatter than he is now
3 played chess since 1998
4 teaching in this school 10 years ago
5 we weren't busy and we had time
6 of transportation should be solved
7 pictures of May Day celebration were shown
8 smoke 2 years ago
9 hasn't seen his brother for nearly 20 years
11 typed for 20 minutes
12 built the new stadium for 10 months
13 collected stamps for 5 months
14 did you last saw him
15 did you start staying here
16 since they bought the house
17 has she studied French
18 20 years since I moved to HCM city
19 you given this book by Mary
20 have just been sent that reference book
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