Bài 1. Dựa vào các từ gợi ý, hãy viết thành câu hoàn chỉnh ở thì Quá khứ hoàn thành.
(Hệ thống tự động chấm điểm, không phân biệt chữ hoa/thường, tự động bỏ qua dấu chấm câu)
1. she / finish / homework / before / go / bed
2. they / leave / station / before / train / arrive
3. I / eat / breakfast / before / go / school
4. Tom / clean / room / before / friends / come
5. we / see / movie / before / watch / again
6. my father / repair / bike / before / I / use / it
7. Mary / write / email / before / meeting / start
8. the students / complete / test / before / teacher / collect / it
9. he / lose / wallet / before / find / it / again
10. Anna / visit / Hue / before / travel / Da Nang
11. they / buy / tickets / before / concert / begin
12. my brother / read / book / before / watch / film
13. we / not finish / dinner / when / guests / arrive
14. the baby / fall asleep / before / mother / come back
15. Jack / do / homework / before / play / games
16. I / never / see / such beautiful place / before / trip
17. my parents / live / Ho Chi Minh City / before / move / Hanoi
18. she / already / leave / when / I / arrive
19. the teacher / explain / lesson / before / students / ask / questions
20. they / build / bridge / before / new road / open
