45. Четвёртый лишний. (§§ 6-7) 1. am, is, have are 2. how, hi, what, when 10. yours, theirs, you, hers 11. big, small, little, young

1. have (because all the others are forms of the verb 'to be') 2. hi (because all the others are question words) 10. you (because all the others are possessive pronouns) 11. big (because all the others mean small or smaller size)