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C3H8+O2->CO2+H2O

 как правильно написать слова в скобках используя времена Pr.perf con,present perfect,pr.simple, pr.con

26. I (borrow) books from this library since we moved here.

27. It (rain) steadily for three days on end now.

28. I (not/see) you for ages. What you (do)?

29.she (be) on the phone for half an hour now. Who she (talk) to?