In which of the following sentences is the subject understood?

A- Slowly taxiing up to the terminal was a huge airplane.

B- It was painted with pink stripes and yellow circles.

C- Step up to the desk and give the clerk your ticket.

D- You are on your way to a special place.

I think it is C.

Correct. :-)

To identify the sentence in which the subject is understood, we need to understand what an understood subject is. In grammar, an understood or implied subject is the subject that is not explicitly mentioned in the sentence but can be inferred from the context.

Let's analyze each sentence to identify if the subject is understood:

A- "Slowly taxiing up to the terminal was a huge airplane." In this sentence, the subject is "a huge airplane," which is explicitly mentioned and not understood. So, the subject is not understood here.

B- "It was painted with pink stripes and yellow circles." In this sentence, the word "it" is used as a substitute for the subject, which is not explicitly mentioned. However, the word "it" refers to something previously mentioned in the context. So, the subject here is understood.

C- "Step up to the desk and give the clerk your ticket." In this sentence, the subject is "you," which is explicitly mentioned. So, the subject is not understood here.

D- "You are on your way to a special place." In this sentence, the subject is "you," which is explicitly mentioned. So, the subject is not understood here either.

Therefore, the sentence in which the subject is understood is B - "It was painted with pink stripes and yellow circles."