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Answer:

1. Due to his hard work, Roy is now a successful teacher.

• Cause: Due to his hard work
• Effect: Roy is now a successful teacher.

2. My parents were late for work because my father forgot to set the alarm.

• Cause: my father forgot to set the alarm.
• Effect: My parents were late for work

3. Many employees were laid off due to economic shutdown.

• Cause: due to economic shutdown.
• Effect: Many employees were laid off

4. Due to increase in price, the sales decrease.

• Cause: Due to increase in price
• Effect: the sales decrease.

5. Martin was promoted. He did his best to satisfy the company's demands.

• Cause: He did his best to satisfy the company's demands
• Effect: Martin was promoted