Fill in the blanks using the following expressions.
1. suffer
2. discipline
3. setbacks
4. made a major contribution to
5. supremacy

1. This invention _____ road safety.
2. Parents have the authority to _____ their children.
3. The US has lost its _____ in world trade.
4. At least he died suddenly and didn’t _____.
5. Don't be put off by any early _____.

Answer key
1. made a major contribution to
2. discipline
3. supremacy
4. suffer
5. setbacks