What is the most difficult aspect of your job?

What is the most difficult aspect of being a baseball player?
野球選手にとって一番大変なことといえば何でしょうか？

What is the most difficult aspect of your job?
お仕事で一番大変なことは何ですか？

What is the most popular movie now?
今、人気がある映画は何ですか？

What is the most popular musical now?
今、人気があるミュージカルは何ですか？

What is the most popular play now?
今、人気がある芝居は何ですか？