单选题 The new teacher ______ between adhering strictly to her lesson plans and taking advantage of a teachable moment.
  • (A) incinerated
  • (B) vacillated
  • (C) coalesced
  • (D) enumerated
  • (E) immigrated


【正确答案】 B
【答案解析】The word vacillated means "wavered or showed indecision." The context suggests that the inexperienced teacher wavered between sticking to her lesson plans and taking advantage of spontaneous teaching moments in the classroom.