11.  His face set, he raised a hand and clicked his fingers.

12.  If you have any questions, please raise your hand.

13.  If you know the answer, raise your hand.

14.  If you want to ask a question, please raise your hand first.

15.  It made a long-drawn-out noise which sounded like a high-pitched foghorn and backed away, raising its hands to its mouth.

16.  Jim raised his hands in a gesture of despair.

17.  No other sound followed - until Gran raised her hands to her cheeks and began to moan softly.

18.  Now he raised his hand, but when Mason called on him Boris began to stutter.

19.  OK, when I call your name, raise your hand.

20.  Perhaps I simply raise my hand.