Question

Jason knows the person......... stars in the film.(who, which, whise) That's the girl....... brother is a doctor.(whoom, whose, which)

Answer 1

1. who

2. whose

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Answer 2

In the first sentence, you should use "who" and in the second sentence, you should use "whose." Here are the corrected sentences:

1. Jason knows the person who stars in the film.
2. That's the girl whose brother is a doctor.