I often see my mother __________ chess with my father after supper.

The child tiptoed(翘起脚尖走) quietly to the bird. ______ into the forest when he was about to catch it.

If I find someone who looks like the suspect, my reaction will be to tell the police.

Please be________. There’s an important meeting in the next room.

It was not until dark ______ he found ______ hethought was the correct way to solve the problem.