念得很好，幾個小問題。s when pronoused as z sound and d when pronoused as d sound are two of the few common Chinese speakers' weakness. Sometimes it helps to exaggerate them when practicing until you mastered them.
Lesson 47: Mysterious Experiences
691. My aunt said she once saw a ghost.
692. What was that noise?
693. I think there’s something in the darkness.
694. No one knew what happened to Simon.
695. The killer’s identity remained unknown.
696. The police don’t know who took the jewels.
697. Her recipe is good because of the secret ingredient.
698. His job in the war is still a secret.
699. She says that she can predict someone’s future.
700. Some people believe that aliens visit Earth from other planets.
701. Truthfully, there have been some unexplained occurrences around the house.
702. Mysterious noises like you heard that seem to have no natural causes.
703. Doors that seem to close on their own and objects that get moved around but not by human hands.
704. A couple of months ago, a friend and I went to a psychic just for a few kicks.
705. Not everything that happens in the world can be explained.
