Question

Which word correctly completes the sentence?

As we approached the station, I was startled by a loud blast of the __________ whistle.

a. trains
b. trains'
c. train's
a?

Answer 1

Let's look at the answers.
a. trains ---> are there many trains?
b. trains'--> Do many trains have one whistle?
c. train's--> Does one train have one whistle?

The correct answer would be c. There is only 1 train that this is referring to