Choose the correct alternatives to complete the text. A vacuum cleaner is a device square uses an air pump to remove dirt, usually from floors. Before they existed, people had to take their carpets and rugs outdoors and beat them. There were many attempts

Choose the correct alternatives to complete the text.
A vacuum cleaner is a device \square uses an air pump to remove dirt, usually from floors. Before they existed, people had to take their carpets and rugs outdoors and beat them. There were many attempts \square a motorised cleaner, but it is claimed that the first one was The Whirlwind, \square was invented by lves W. McGaffey in Chicago in 1868. It was difficult to use because the operator had to turn a handle and push the machine at the same time. The early cleaners blew air (and dust) out, but it was Hubert Booth, in 1901, \square designed the first commercial suction machine Although effective, many people complained about the noise it made. Nowadays, inventors continue \square the design of vacuum cleaners, and strong suction power and low noise remain their goals.