20. Don't ________. You will ________ new customs and different ways of thinking.

A. lose your heart; apply to　　 B. lose heart; apply yourself to

C. lose your heart; adapt to　　　　 D. lose heart; adapt yourself to

19. It’s a programme designed to______ mainly to 10 to 16 year-olds.

A. appeal 　　　　　　　　　　 B. attach　　　　　　　　 C. contribute　　　　　 D. refer