Answer:
Question 2: which I got
Explanation:
In Question 2, the correct answer is that "what I got" should be "which I got". "What" is used for object clauses, while "which" is used for relative clauses, and here "which I got" is a relative clause defining a camera.
In Question 3, the correct answer is "and you should also think about whether", because this sentence - "You should read some reviews before purchasing that bicycle, and one should also think about whether you want to spend that much money." sounds personal and direct, so there is no need for general usage of "one".
In Question 4, the correct answer is "Dancing in a studio setting and dancing in one's own living room", because the position in the sentence demands a noun, and gerunds act like nouns in sentences.
In Question 5, the correct option is "Neither my grandmother nor", because the correct grammatical structure is "Neither... nor".