1) The Ocean -slopes\currents\surfaces\floods- move pollution around in the water.

[email protected] в категроии Английский язык, вопрос открыт 21.05.2017 в 16:24

2) several buildings -have collapsed\collapsed\have been collapsing- during the earthquake last week (+какое именно здесь время?)
3) Sally had left -before\after\already- we started collecting donations (+какое именно здесь время?)
Заранее благодарю за ответ.