虽然你的提问和答案选项都有点破绽,根据整句话的语境只有C 是唯一可能正确的填法.
估计完整句子应该是这样:
By the time the new pupil (gathered) enough courage to raise his hand, the bell for the end of the lesson (already rang).
虽然你的提问和答案选项都有点破绽,根据整句话的语境只有C 是唯一可能正确的填法.
估计完整句子应该是这样:
By the time the new pupil (gathered) enough courage to raise his hand, the bell for the end of the lesson (already rang).