Make questions to the underlined word 1)Vitamins play a very important role in a human health..(What?) 2)A good dentist

1) Vitamins play a very important role in a human health.(What?)

Do Vitamins play a very important role in a human health?

What plays a very important role in a human health?

What role do vitamins play in a human health?

2)A good dentist can extract teeth painlessly.(How?) 

Can a good dentist extract teeth painlessly?

How can a good dentist extract teeth?

Who can extract teeth painlessly?

What dentist can extract teeth painlessly?

What can a good dentist do?