4: Combine each pair of sentences to make one sentence. Using the word given in brackets:
1. The Buffalo-fighting Festival took place in Do Son last Saturday. There were so many people. (BECAUSE)
2. We won't hold the festival. It costs too much money. (IF)
3. The prince saw Sleeping Beauty. He kissed her on the forehead. (WHEN)
4. The tortoise was running. The hare was sleeping. (WHILE)
. The girl worked hard. Her stepmother wasn't happy. (ALTHOUGH)