A red light is often used as a danger _____.A. signalB. signC. warningD. reminder

相关问题

• 1、Which of the following italicized parts is used as an object complement？A．He is often hear
  2017-08-15
• 2、Which of the following reflexive pronouns（反身代词)is used as an object？A．John often put h
  2017-09-06
• 3、Which color does Americans often use to express heat？A．Pink.B．Red.C．Blue.D．Black.
  2017-09-08
• 4、The oil must have been used up ______the light went out.A．becauseB．forC．sinceD．as
  2018-02-24
• 5、Mary and I see each other ________ but not as often as we used to.A. sooner or later B
  2018-07-07
• 6、Copper is often used as an electrical conductor because it _____.
  2018-07-15