Answer:
<u>cylinder </u>is the subject
Explanation:
Subject is whatever that is being talked about or discussed in a sentence. In the sentence you posted, we are talking about a “steel cylinder”, right? Steel is the adjective for the subject, cylinder. Steel is the adjective and cylinder is the subject.
They will escape on a boat heading for Europe
Answer:
The pronoun "it" is wrong because the word "domes" is plural and "it" is singular. You would replace it with "they".