Answer:
1. We <u><em>felt</em></u> sorry for the poor boy.
2. He didn't <u><em>hesitate</em></u> to help those who needed help.
3. She <u><em>failed</em></u> in her task and started crying.
4. A sudden disaster <em><u>struck</u></em> North Carolina and destroyed the seeds.
5. George was <em><u>supposed</u></em> to be there at 6.00 but he wasn't.
6. The gates <u><em>slammed</em></u> shut behind them.
7. He passed the <u><em>message</em></u> to all his students.
8. He decided to <em><u>set</u></em> the birds free.
Explanation:
In the given sentences, the appropriate words to be used in their blanks will ensure the sentences are complete and make sense.
Therefore, the correct words filled in the blanks are as follows-
1. We <em><u>felt</u></em> sorry for the poor boy.
Here, the word "felt" is a verb, the past tense of feel, which shows an emotional expression.
2. He didn't <em><u>hesitate</u></em> to help those who needed help.
The word "hesitate" means reluctant, a bit of a refusal.
3. She <em><u>failed</u></em> in her task and started crying.
"Failed" means unable to succeed, not successful.
4. A sudden disaster <em><u>struck</u></em> North Carolina and destroyed the seeds.
The verb "struck" is in the past tense showing an act of being "attacked" or destroyed.
5. George was <em><u>supposed</u></em> to be there at 6.00 but he wasn't.
"Supposed" means expected to, have to be but doesn't happen as expected.
6. The gates <em><u>slammed</u></em> shut behind them.
"Slammed" means the forceful, loud way of closing the door, an act more generally assumed to be done out of anger or frustration.
7. He passed the <u><em>message</em></u> to all his students.
"Message" here is a noun that contains information about something.
8. He decided to <em><u>set</u></em> the birds free.
"Set" is to let it be, an act that will result in something.