Choose the correct answer

Nhờ mn sửa bài giúp em ạ(nếu sai). Còn đúng thì thôi. Em cảm ơn ạ.
----- Nội dung dịch tự động từ ảnh -----
15.
13. Henry
the piano upstairs while his brother William
was playing-was practising
C. had played-practised
14. Tom
B. wasn't playing - practised
chess in the basement
12. John
A. is
his dog in the back yard when the community worker on the front door.
A. hadn't fed-was knocking
C. was feeding - knocked
they
to music or
A. Did...listen - watched
C. Did...listen - had watched
D: played - hadn't practised
B. fed knocked
D. didn't feed - was knocking
13. Su
their favourite TV show at seven thirty last night? A-
B. Had...listened - watched
D. Were...listening - watching
C
4. E