(0) While he was сhoosing a Christmas tree, a flamingo flew near.
(1) While he was reading his e-mails, he saw a ghost behind the computer.
(2) While he was swimming in the pool, a crocodile caught him.
(3) While he was walking across the street, he met a panda.
(4) While he was sweeping the floor, Santa came in.
(5) While he was watering the flowers, the flower changed its colour.
2.
sing-sang-sung-петь
go-went-gone-идти
come-came-come-приходить
buy-bought-bought-покупать
---
fly-flew-flown-летать
swim-swam-swum-плавать
run-ran-run-бегать
sleep-slept-slept-спать
speak-spoke-spoken-говорить
Чем смог тем помог
:)
1 to share 2 are always looking for (в таком виде говорится, чтобы показать негативное отношение, в качестве альтернативы возможен Present Simple - always look for) 3 are simply hanging around (аналогично пункту 2, возможный вариант - simply hang around) 4 aren't 5 don't behave 6 have been going 7 listen to 8 play 9 help 10 met up 11 are realizing 12 have already put up 13 have been 14 have done 15 raised 16 was organized 17 is organized 18 to say 19 don't judge 20 depends