1. While I was wondering at this, our schoolmaster took his place.
    当我正为这些情景感到诧异时, 我们的老师回到了讲台上.

2. While I was wondering at this, our schoolmaster took his place.
    我正感到纳闷，只见老师登上了讲台，

3. Children are afraid of the austerity of their schoolmaster.
    孩子们都害怕校长的严厉。