1) You ..... turn off the tap. a) must b) mustn't 2) We ..... plant trees. a) mustn't b) must 3) You ..... turn off the lights. a) must b) mustn't 4) You ..... throw rubbish in the street. a) must b) mustn't 5) We ..... cut down trees. a) must b) mustn't 6) You ..... walk, cycle or use public transport. a) mustn't b) must 7) We .... buy unnecessary things. a) must b) mustn't

Leaderboard

Visual style

Options

Switch template

Continue editing: ?