Mr Johnson, what are teachers supposed to do for the students?—As teachers, we feel ________ our duty to teach our children to be good wherever we are.[ ]

The old professor asked us ______ we read books in our spare time

You may choose one from _________ was left.

I’m sorry I’m late. — ________.

The most energetic and important festivals are the ones that ____ the end of winter and to the coming of spring. [ ]