Giải thích và làm vote 5s

1. was calling/didn't/ was studying

 - at 9 last night-> QKTD. QKTD= S+was/were +Ving, S+ Vqk

2. didn't hear/ was sleeping

- last night

3. was shining/ were singing

-yesterday

4. were talking/ walked

- HĐ bước vào cắt ngang HĐ nói chuyện

5. didn't be/ were playing

- Họ không ở đó vì đang chơi ở nơi khc

6.fell/ was reading

- HĐ ngủ cắt ngang vc đọc

7. was snowing/ was shining

- có từ while 

8.was shovelling/ was bringing

 - có từ while 

9.had/ was driving/hit

-last week

10.Were/ playing/started

-tạm dịch: họ có đang chơi quần vợt khi trời bắt đầu mưa không?