_____ a spoonful of soil can tell us so much about the structure and early history of the moon. A. Remarkable B. Quite remarkably C. It is remarkable that D. It is remarkable 17. _____ you nominate will be elected. A. Who B. Which C. Whomever D. That’s 18. _____ book you borrow must be returned within a week. A. What B. Which C. Whichever D. That’s 19. _____ is troubling me is that I don’t have much experience in international commerce. A. It B. That C. Which D. What 20. _____they wil go there to try another experiment has not been decided yet. A. Whether B. If C. About whether D. Why