Make up sentences. 1. are/waste of/that/some/time/argue/flashmobs /people 2. people/of/in a place/ and/unusual/an/is/suddenly/performance/time/ brief/ for/perform/ who/a group/flashmob/assemble/

1. People argue that some flashmobs are waste of time.
2. Flashmob is a group of people who assemble in a place and suddenly perform an unusual performance for brief time.