She ________ into the thick forest alone on such a dark night.

We _____ know things about each other that we should not know, have no right _____, and have a right, actually, not to know.

I was about to walk over to Tom's seat when he ______ and left.

In the north people sometimes tie straw ropes (草绳) round the trees in winter to ______ them from the cold.

All the doctors in the hospital insisted that he ______ badly wounded and that he ____ at once.