REWRITE THE FOLLOWING SENTENCES USING THE GIVEN WORDS.
1. Mai ate a lot last night, so she had a stomachache.
-> Because
2. Nam doesn’t study hard so he fails the exam.
-> If
3. Although she had a high salary, she was bored with that job.
-> In spite of
4. I will stay at home unless the weather is good.
-> If
5. Many rivers and lakes are contaminated. Factories discharged dangerous waste into rivers and lakes.
->Because

1 Because Mai ate a lot last night, she had a stomachache.
2 If Nam studies hard, he won’t fail the exams.
3 In spite of having high salary, she was bored with that job.
4 If the weather isn’t good, I will stay at home.
5 Because factories discharged dangerous waste into rivers and lakes, many rivers and lakes are contaminated.