I2. 6B Uncountable and plural nouns. Key

2 some jeans / 3 says / 4 is / 5 housework / 6 rubbish / 7 business / 8 the research / 9 equipment / 10 a piece of / 11 some / 12 is / 13 is / 14 some advice / 15 - / 16 some / 17 those scissors / 18 them / 19 the / 20 homework / 21 some