II. Combine each pair of sentences, using “Because, Since, As” 1. Mary looks happy. She has just got good marks. 2. A computer can be used for various purpose. It becomes very popular today. 3. The burglars were able to break into his house. He has forgot to lock one of the windows. 4. The exercise is not easy. I shall have to consult my teacher. 5. I didn’t come in time. There was a traffic jam. 6. The teacher is sick. We’ll have no class tomorrow. 7. He studies maths very hard. He wants to become a teacher of maths. 8. Peter was worried. Mary was late. 9. The T.V program was uninteresting. They went to bed early. 10. I couldn’t answer all the oral questions well. I felt too nervous.