Exercise 3. Checking conjunctions 1. He has made a lot of mistakes in his writing because his carelessness. 2. They had to sell their house because of they needed money. 3. People are not allowed to enter the park after midnight because lack of security. 4. In spite of my father is old, he still goes to work. 5. In spite the danger, they managed to cross the river during the night. 6. We haven’t seen each other from we left school. 7. Although Nam worked very hard, but he didn’t pass the final exam. 8. Dinosaurs became extinct millions of years ago because of the earth's climate changed drastically. 9. It was not when he talked to her that he knew the truth. 10. Although taking a taxi, Bill arrived late for the concert. 11.When many of my friends take a shower in the morning, I usually take one before bed. 12. Although it was raining, Anna didn’t take her swimming lesson.