In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
There will only be two types of human beings in the future: the minority having enormous brains and (1)________ bodies, and the majority with tiny brains and muscular bodies. The size of the average brain will (2)________ diminish; not because of our innate laziness, but because of our over - concern about our physical appearance. In the old days, most people dreamt of having shelter and a stable food supply. As we no longer struggle for the basic (3), our dreams focus instead on the search for physical beauty, how to obtain and maintain the ‘ideal body shape’ and healthy life the media promotes. Physical beauty will become the main goal of the majority. They’ll do exercises every day, taking (4) to maintain their shape while not noticing that their brains are shrinking. Actually, there is no doubt that they’ll work (5)________ hard to make their brains smaller.