John read the book again in order to get more information from it. Which of the following is correct for the underlined word in the sentence

Even though they have worked side by side in the same office for 9 years, the two ladies ______ on good terms.

Can you see many apples _____ the tree—- No, there are a few birds _____ it.

Nobody in our class received a(n) _____________ to the party.

The students are ___ young people between the age of sixteen and twenty