1. **Susan, who is a terrible ballet dancer, is not very good at the tap-dancing either.**
   - The word "either" is unnecessary. The correct sentence would be: "Susan, who is a terrible ballet dancer, is not very good at tap-dancing."

2. **They drove around the Paris in a car.**
   - The word "the" before "Paris" should be omitted. The correct sentence is: "They drove around Paris in a car."

3. **He travelled to Lisbon, the capital of Portugal, by a car.**
   - The article "a" before "car" should be omitted. The correct sentence is: "He traveled to Lisbon, the capital of Portugal, by car."

4. **I was invited to a dinner given to welcome the President Chirac of France.**
   - The word "to" after "given" is unnecessary. The correct sentence is: "I was invited to a dinner given to welcome President Chirac of France."

5. **Our plan was to meet him at Café Sandal and not at the home.**
   - The word "the" before "home" should be omitted. The correct sentence is: "Our plan was to meet him at Café Sandal and not at home."

6. **It was nice of you to invite me to go to the Malta with you.**
   - The article "the" before "Malta" should be omitted. The correct sentence is: "It was nice of you to invite me to go to Malta with you."

7. **She was born in the July, 1971.**
   - The word "the" before "July" should be omitted. The correct sentence is: "She was born in July 1971."

8. **She has got a plenty of time to reach the station.**
   - The article "a" before "plenty" should be omitted. The correct sentence is: "She has got plenty of time to reach the station."

9. **Can you walk the faster?**
   - The article "the" before "faster" should be omitted. The correct sentence is: "Can you walk faster?"

10. **Tigers are in danger of becoming an extinct.**
   - The word "an" before "extinct" should be omitted. The correct sentence is: "Tigers are in danger of becoming extinct."

11. **I like the active holidays more than relaxing ones.**
    - The article "the" before "relaxing" should be omitted. The correct sentence is: "I like active holidays more than relaxing ones."

12. **It is known that smoking does a damage to your health.**
    - The article "a" before "damage" should be omitted. The correct sentence is: "It is known that smoking does damage to your health."