1, 2, 3, 4

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Across
  1. 3. What a drive-through takes
  2. 5. Jason Mraz hit
  3. 11. Value
  4. 12. Expert, for short
  5. 14. Negative
  6. 15. Fruity fizzy dessert
  7. 18. Zero
  8. 21. Eighteen, legally
  9. 24. Drunk
  10. 26. Missing alert
  11. 28. Hockey disk
  12. 30. A Frenchman's excitement
  13. 32. Musical inspired by Chinese folklore
  14. 36. Ornate openwork fabric
  15. 37. Milkmaker, perhaps
  16. 38. Seventeen
  17. 39. Not right-handed
  18. 40. Simple sequence of digits
Down
  1. 1. Political group
  2. 2. Immediate danger
  3. 4. A fourth
  4. 6. Electrons in the outermost shell
  5. 7. Twelve
  6. 8. Collection of birds
  7. 9. A Brit's buck
  8. 10. Malaysian actress Michelle
  9. 13. American activist Tubman
  10. 16. Biggest swimmer, perhaps
  11. 17. Earthy spice
  12. 19. "Collecting ___"
  13. 20. "___frog"
  14. 22. Curve
  15. 23. Equals two
  16. 25. Figure holding a sickle
  17. 27. Seven-digit number
  18. 29. Crude, cooking, or coconut
  19. 31. Who Taylor Swift gives thanks to
  20. 33. Divine
  21. 34. Before numbers, biblically
  22. 35. One hundred cents
  23. 37. Arithmetic, largely