(a) She usually spends her time reading books in the nearby library on Sundays. <br/><br/>(b) She usually spends time reading books in the nearby library on Sundays. <br/><br/>(c) She usually spends her time reading a book in the nearby library on Sundays. <br/><br/>(d) She usually spends time reading a book in the nearby library on Sundays. <br/><br/>Which of the above four sentences sounds the most natural to native speakers? Plus, are there any sentences that sound strange?