Confusing Words - 4

Direction: The question has four statements. Each statement uses a pair of words marked (A) and (B), one of which will make coherent sense in context of the sentence. For each sentence choose the best fit and select the option that indicates all correct answers.

1. I have more money (A) then / (B) than Sham.
2. They came (A) thorough / (B) though they were tired.
3. The exam period is (A) imminent / (B) eminent.
4. The company should (A) persecute / (B) prosecute the offenders.