Join the sentences, using the given word in brackets.

1. Jenny didn't attend the job fair. She was ill. (because)

2. Henry is excellent at maths. Everyone thinks he will become a mathematician. (since)

3. Mai practised speaking English a lot. She wanted to get a high score on the speaking test. (because)

4. Ms Nga is away this week. We'll put off the next class meeting. (since)

5. I couldn't go to the office on time. There was a traffic jam. (because)