13. Friendship is spontaneous and to be worked at, both natural and________._
举一反三
- The spontaneous shoaling of tuna is a clear example of natural ______.
- Spoken English is not well planned, but ______. A: spontaneous B: natural C: sudden D: practical
- Friendship is both a source of pleasure and a component of good health.
- 13. Samuel Taylor Coleridge described poetry as "the spontaneous overflow of powerful feelings.
- Both men worked hard and succeeded in their career.