13. Now that you've come, you'd better have dinner with us.

12. I will find her wherever she may be.

11. Once you begin the work, you must continue.

10. Even if (though) I fail. I’ll never lose heart.

9. Since you are very busy, I won't trouble you.

8. He studied hard so that he could catch up with his classmates.

7. Where there is water, there is life.

6. No sooner had I got home than it began to rain.

5.I shall go to the park unless it rains.

4. He is such a good teacher that the students love and respect him.