中国大学MOOC: The ______ of his scream sounded in the cave for several seconds.
举一反三
- 中国大学MOOC: Plato is known for his famous allegory of the cave, which tells us that ________.
- 中国大学MOOC: Where is Reed Flute Cave?
- 中国大学MOOC: A good first impression is usually formed within the first few seconds.
- 中国大学MOOC: The time you shake hands should be limited in 3 to 5 seconds.
- The cave, his hiding-place， is secret.