He ________ when we least expected him.[ ]

With the rapid development of medical science, we ___ more new drugs used in the treatment of cancer

Please turn off the TV. The baby _______.—OK, I’ll go out for a walk.

The room ____ Mr White lives is notvery large

The little boy, along with his classmates, ______for their bravery action in time of danger.— I think we should learn from them.