Answer:
The answer is explained below.
Step-by-step explanation:
In this case, it is necessary to make these sentences questions because they include differente question words. They are changed into the following:
1) Who did you meet?
2) What time did Harry arrive?
3) Who did you see yesterday)
4) What did they want?
5) What time did the meeting end?
6) Why did Pat go home early?
7) What did you have for dinner?
8) How much did it cost?
9) What did he buy?
10) What did you eat?