1) came up; was speaking
2) paid; had chosen
3) was reading; returned
4) it was stilling to rain; we got
5) had checked; he turned off
6) gave; realized; had reminded
7) was cooking; she had understood; she didnt buy
8) came; was discussing; had invented
9) got; had flown up
10) was playing; she found; had losed
Не уверен, что правильно, так что в ошибках не винить.