1. My mum cooks dinner every day a) Dinner is cooked by my mum every day b) Dinner was cooked by my mum every day 2. They have cut all the trees down a)All the trees were cut down b)All the trees have been cut down 3. Last week, my father bought a new smartphone a) A new smartphone is bought by my father last week b) A new smartphone was bought by my father last week 4. This band won't sing my favourite song a) My favourite song will not be sung by this band b) My favourite song has been sung by this band
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