18. As (So) long as you work hard, you can catch up with the other classmates.

17. No matter when you come, you are warmly welcome.

16. India is much bigger than Japan.

15. We must do everything as he tells us.

14. He was so excited that he couldn't fall asleep.

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.