The audience (is, are) listening to a Beethoven symphony.

What is the problem with the following sentence: cameron, who has an extreme and unreasonable suspicion of other people and their motives, suffers from paranoia which is a psychological disorder characterized by delusions of persecution or grandeur, was absolutely sure that someone was following him even though he was absolutely alone and hadn't seen a car for miles and miles.

What point is the author trying to make by comparing the travel times of the first transcontinental railroad and the first transcontinental flight?

Which sentence contains the central claim in "compulsory voting: an idea whose time has come" by tor hunter?