Решение:
Вставляем пропущенные слова, подходящие по смыслу:
- Look at the floor! What a mess
- Never. It was an accident
- Let's help Sally to clean up
- OK. You can wash the floor.
- Be careful! Don't walk on the floor, now. It's wet
Ответ: mess, accident, clean up, wash, wet.