中国大学MOOC: A silkworm becomes mature after shedding its skin for three times.
举一反三
- A silkworm becomes mature after shedding its skin for three times. A: 正确 B: 错误
- How many times have they been to France A: Three times. B: Four times. C: Five times.
- 中国大学MOOC: Three times seven is twenty-one.
- 中国大学MOOC: An acceptance can be revoked after it becomes effective.
- When should you pick up the phone? A: After ringing once. B: After ringing twice. C: After ringing three times. D: After ringing four times.