Instruction

Select the best answer to complete the sentence.

1. One of the engineers says there is a -------- of maintaining the system.

2. A freedom of expression exists -------- individual freedom.

3. If you have any questions, feel -------- to ask anytime.

4. I don’t know -------- to apologize to you.

5. If it -------- for his help, we couldn’t have finished our homework.

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