Нужно преобразовать глаголы в скобках в present perfect или past simple, в зависимости от контекста. 13. the bell (to ring) repeatedly, but they (not to answer) it, and presently it (to stop). 14. you can’t see herb. he (to be out). — no, he (not to be). i (to watch) him go in with his dad and he (not to come out) yet. 15. she (to lift) her bag from the sideboard and (to take out) a two-shilling piece. 16. “good morning, mrs watt," she said. “eric (to tell) you what to do? ” 17. i (to love) you since i (to see) you walk into that classroom. 18. i don’t think i (to be out) more than a couple of minutes. 19. the thing is that i (to come) to have a talk. 20. i’m her sister, and we (to have) only each other since dad (to die).

13. The bell (to rang) repeatedly, but they (did not  answer) it,
and presently it (has stopped). 14. You can’t see Herb. He (is
out). — No, he (is not). I (watched) him go in with his dad
and he (has not  come out) yet. 15. She ( lifted) her bag from
the sideboard and ( took out) a two-shilling piece. 16. “Good
morning, Mrs Watt," she said. “Has Eric ( told) you what to
do?” 17. I (have loved) you since I (saw) you walk into that
classroom. 18. I don’t think I (have been out) more than a couple
of minutes. 19. The thing is that I (have come) to have a talk.
20. I’m her sister, and we ( have had) only each other since Dad
( died).