Giúp em với mọi người bí quá

Công thức câu tường thuật - dạng WH-questions:
S + asked / wanted to know / wondered + (O) + WH + S + V (lùi thì)
—---------------------------------
HTĐ → QKĐ
HTTD → QKTD
HTHTTD → QKHTTD
HTHT → QKHT
can → could
QKĐ → QKHT
could → could
will → would
—---------------------------------
now → then
this → that 
yesterday → the day before
here → there 
tomorrow → the next day
today → that day
last week → the week before
—-----------------------------------
Đáp án:
1. Tom asked Ben what colour his new car was.
2. The boss asked Mr. Grey what he was looking for under his table then.
3. Mike asked Lana how long she had been waiting for him.
4. Tine asked her mum why they couldn’t buy a bigger flat.
5. The teacher asked Susan how old she was.
6. The man asked his sons how they had tried to cope with that problem.
7. Peter’s wife asked him why there wasn’t any coffee for her.
8. Linda asked her children where they had put her new slippers.
9. The teacher asked Jack where he had found that great book.
10. Peter’s grandma asked him why he was so sad.
11. Ms. Stone asked Andy what had happened to his father the day before.
12. Linda asked her friends how they could drive there in that storm.
13. Peggy asked Dan when he had lost her telephone number.
14. Mike asked Sam who she would take to the hospital the next day.
15. The boss asked Mr. Grey why he was wearing that awful shirt.
16. The man asked Mrs. Hill what he could do for her.
17. Paul’s mum asked him how many apples he had eaten that day.
18. Pau’s mum asked him how often he cleaned his teeth a day.
19. Dad asked the children what they had brought to the picnic the week before.
20. The teacher asked Jack when his birthday was.
#STMIN