下列词语中，没有错别字的一组是（ ）

Are you good ______ your students — Yes, I am.

_ they may have, the CEO of thecorporation calls on all the staff to gather their courage to strive it

_______ a dark night, they took the sick boy to the hospitalAnd after an hour’s curing, the boy was out of danger very soon

Tell him _______ the window.[ ]