(essential, crucial, required, needed, important) pick whichever one is in the parenthesis as i can’t see the text that you’re reading
The sentence which does not contain any
punctuation errors is:
<span><span>
A. </span><span>Waiting for my friends, I think that I arrived
too early. </span></span>
<span>
The sentence
is divided into dependent and independent clauses. The first clause is
dependent because it does not make sense and can’t stand alone without the
independent clause.</span>
She was wondering whether they've (A) completed their lifeguard training.
