Определить время предложения на 13. when i came home yesterday, the children were running and singing merrily. "we are learning a new song! " they cried. 14. when the young man entered the room, she looked at him in surprise. "what do you want to tell me? " she said. "why have you come? " 15. it was raining hard when i left home yesterday, so i returned, put on my raincoat and started again. 17. have a look! that is the golden gate brige on your left.-oh,it is beautiful. i've just taken a picture of it. 21. i have spained my ankle again. 22. a world-famous violonist is playing at tonight's concert. 23. the children were playing with their train sit the whole evening yesterday.

13. When I came home yesterday - PAST SIMPLE  
the children were running and singing merrily. - PAST CONTINUOUS
 "We are learning a new song!"  - PRESENT CONTINUOUS
they cried. - PAST SIMPLE
14. When the young man entered the room, she looked at him in surprise. - PAST SIMPLE
 "What do you want to tell me?"  - PRESENT SIMPLE
she said. - PAST SIMPLE
"Why have you come?" - PRESENT PERFECT
 15. It was raining hard  - PAST CONTINUOUS
when I left home yesterday, so I returned, put on my raincoat and started again. - PAST SIMPLE
Have a look!  That is the Golden Gate Brige on your left.-Oh,it is beautiful.- PRESENT SIMPLE
I've just taken a picture of it. 21. I have spained my ankle again.  - PRESENT PERFECT
22. A world-famous violonist is playing at tonight's concert. - PRESENT CONTINUOUS
 23. The children were playing with their train set the whole evening yesterday. - PAST CONTINUOUS