For questions 1−5, change these active sentences into passive sentences. example: they manufacture most of the parts in china. most of the parts are manufactured in china. 1 they transport the goods to the factory by rail. 2 we keep all the contracts in a locked cabinet. 3 they sell the detergent in 500 ml bottles. 4 at the end of the day, they take the finished products to the storeroom. 5 we give a welcome pack to each new customer.