六年级英语，变特殊疑问句？

正好我也是六年级的，我的英语练习册上有这几道题，答案是这么写的：
1.What did you do last week?
2.Where did he see a beautiful picture?
3.When did she have a good time?

we went fishing last week:
划线：went fishing
What did you do last week?

he saw a beautiful picture in the supermarket.
划线：in the supermarket
Where did he see a beautiful picture?

she had a good time last weekend:
划线：last weekend
When did she have a good time?

WHAT DID YOU DO LAST WEEK

WHERE DID YOU SEE A BEAUTIFUL PICTURE

WHEN DID SHE HAVE A GOOD TIME