call on to

• My teacher was never called on to give evidence
  没有叫我的老师作证。
• When they ' re called on to answer questions
  当叫到他们回答问题时。
• He was called on to speak at the meeting
  他被邀请在会上讲话。
• The traveling merchant can call at or call on to talk business
  客商可来电洽谈，或预约上门洽商。
• He was called on to make a speech
  他被请求发表演讲。
• Moses was a stutterer , yet he was called on to be the voice of god
  摩西有口吃，但他后来却成为上帝的福音使者。
• If you do not say anything , you will not is call on to repeat it
  倘使你不发一言，就不会被要求重复再讲一遍了。
• If you do not say anything , you will not be called on to repeat it
  倘使你不发一言，就不会被要求重复再讲一遍了。
• Is it a dog fallen into water ？ luxun called on to beat water dog hardly
  水狗是不是落到水里的狗？需不需要痛打呀？
• You are a very understanding person , and often you are called on to lend a sympathetic ear
  你是个很体谅的人，而且你经常被叫去听他人诉苦。