Part 2 Vocabulary and Grammar V. Choose the best answer. (本大题答案必须用2B铅笔填涂。) (共20分) 31. In the United States, Father’s Day is on ________ third Sunday in June. A) a B) an C) the D) / 32. Teachers help children become bright teenagers with _______ knowledge. A) they B) them C) their D) theirs 33. ________ August 24, 2006, word came that Pluto(冥王星) was no longer a planet. A) On B) In C) At D) Before 34. In fact, there wasn’t so much ________ in the city as they had