This is a very ----- subject, so please don’t laugh.
Johnny and Peter ----- that the Earth is flat. I think they are wrong.
If you want to ----- a fire in the kitchen, always practice cooking safety.
I am afraid of many things. I even have a ----- of cats.
The ------ of pollution in the ocean is growing.
Mark’s speech did not have the ----- he wanted. No one was as excited as him.
People are worried that the river’s water level will ----- and destroy houses during the rainy season.
It’s my ----- to watch the children when the teacher is out of the classroom.
Rise
Claim
Duty
Amount
Serious
Prevent
Effect
Fear