напишите время 20.30,11.00,21.15,12.40,17.50,16.30

20:30 - It is half past eight p. m.

11:00 - It is eleven o'clock.

21:15 - It is quarter past nine p. m.

12:40 - It is twenty to one.

17:50 - It is ten to six p. m.

16:30 - It is half past for p. m.

Или

20:30 - It is eight thirty p. m.

21:15 - It is nine fifteen p. m.

12:40 - It is twelve forty.

17:50 - It is five fifty p. m.

16:30 - It is four thirty p. m.