15. this book (have to return) to the library tonight. 16. the other books (return) yesterday. 17. that book (should return) tomorrow. 18. these letters (be going to mail) tomorrow. 19. that letter (ought to send) immediately. 20. this letter (must send) today. 21. those letters (arrive) yesterday. 22. i don’t have my car today. it’s in the garage. it (repair) right now. 23. kate didn’t have her car last week because it was in the garage. while it (repair), she took the bus to work. 24. the mechanic (repair) tina’s car last week. 25. glass (make) from sand. 26. you (should carry, not) large sums of money with you.