Jigsaw Sentences

Join each group of sentences together to make single sentence, in as many ways as you can.

19. They have made many errors. They do not know.

Aware. How. Realise.

20. He took a key from his pocket. He unlocked the door. He flung it open.

Draw. Turn.

21. He crouched against the wall. At the same time he enjoined silence.

Lips. Motion. Quiet.

22. He may crack the code. No one else will.

Anybody. If. Unless.