■ successful 与 successive

前者是“成功的”，后者是“连续相继的”。

• a successful attempt to land on the moon成功的登月之举
• three successive years of low rainfall连续三年的少雨。

• contrary to
• contribute
• contribute 与 contribution
• contribution
• control
• controversial
• controversial 与 contentious
• convenient
• convince
• convinced
• convince 与 persuade
• cook
• cord
• cord 与 chord
• corner
• corporate
• corps
• corps, corpse 与 corpus
• corpse
• corpus
• cost
• could
• could not enough
• could't enough
• council