Jerry: What do you ①--a soy or meat burger?
Alec: I would ② have soy.
Jerry: ③ a vegetarian diet, I still got fat.
Alec: ④ eating soy, so am I.
Ricky: You're both ridiculous.

Use all choices in the spaces above:
prefer
despite
rather
In spite of my

Answers And Explanations
Jerry: What do you (①) prefer--a soy or meat burger? 'Prefer' is used regarding choices.
Alec: I would (②) rather have have soy. 'Rather' precedes a verb, such as 'have.'
Jerry: (③) Despite a vegetarian diet, I still got fat. 'Despite` precedes a noun.
Alec: (④) In spite of my eating soy, so am I. 'In spite of' precedes a noun or a... pronoun or Proper Noun and then a verb. But here, we have 'my,' which couldn't come before the 'a vegetarian diet' in number ③。　
Ricky: You're both ridiculous.