What does the word “impregnable” mean as it is used in paragraph 2?

Isaw him _ .(a)danced (b)dance (c)dancing

In which sentence is the subjunctive mood correctly used? if she were impatient, she would not be suited for this work. they are ready to go to work now. she was impatient to get to work on time. he listens to instructions very carefully when at work.

What is the purpose of the introduction in an essay? a to establish the main idea of the essay b to explain the main idea to the reader c to highlight the most important concepts d to focus on current statistics