Answer:
We are listening to the radio when father comes home.
A radio ad communicates ideas audibly, not visually, so it cannot let people see images of the painter’s works.
A lot of people won’t be pulled in because they can’t see the paintings. I’d say this is the answer, since the other three don’t really fit. Radio ads can play more than once, most of them aren’t even funny, and they’re short, but they usually have an address or location attached.
Less is a comparative form of adjective. Comparative degree of comparison is comparing two nouns. In the sentence, the space in the old house is compared to the new ones, Positive degree is used in describing only one noun, and superlative degree compares three nouns.
Gorillas, which are large and originate in Africa, can sometimes be found in zoos.
The word to be filled in this problem would be salary. Though you can use other words and/or phrases that would just fit in like a glove to complete the thought and make sense out of it. Since there is no particular instruction as to what is to be needed to be filled in there, then any word or words or phrases or even sentence fragments will do. As long as the thought is complete and that it makes sense when read, then there is no problem.
