■ bow and arrow

“弓箭”如果理解为一种武器的整体，作为主语时动词用单数。

• The bow and arrow was invented at that time.弓箭是那个时候发明的。

• comic
• comical
• comic 与 comical
• coming through
• coming through, please
• coming through. 或 coming through, please.
• command
• commit
• commitment
• common
• common knowledge
• common sense
• common sense 与 common knowledge
• communication
• community
• company
• compare
• compared
• competition
• competitive
• compile
• compile 与 compose
• complement
• complement 与 compliment
• complex