1. For I have never met him, I can’t tell you what he looks like. 2. The teacher is very strict with us, simply since he wants us to make rapid progress. 3. Because all the shops have closed, it must be very late now. 4. He didn’t attend the meeting, not for he thought it was unimportant, but for he had too much work to do. 5. It was simply as he was ill that he didn’t go to work. 6. Because the weather is so bad outside, why don’t you stay with us overnight? 7. Just as he was in a hurry, he left his passport at the bank. 8. It is because the birds are singing that it must be early morning. 9. Do you despise him since he is poor? 10. Probably since the streets flood so often after heavy rain, they need a drainage system badly.