I can think of a few reasons for the allergy to substance.
There are reasons why there's an allergy.
I do not know any reasons for the allergy to substance.
A man plays drums while making a face with his gray sweatshirt on.
A boy is playing on a waterslide.
I don't need Mr. Brown at all.
Mary has been causing problems on the Range.
The Environmental Protection Agency is only charged with protecting the air.
People are sleeping.