Below are 10 ideas for starting your questions:

What is . . .

How do/does/did . . .

What procedures or actions . . .

What problems . . .

What happens when . . .

What is/was the role of . . . in . . .

What is/was the difference between . . .

What causes/caused . . .

What are/were the effects/results of . . .

How/why did . . . decide to . . .

Who/what influenced . . . to . . .

What is/'was the relationship between . . . and . . .

What are the competing sides . . .

How does/did . . . change . . .