For many years scientists tried have been trying to define the nature of human intelligence. However, they have been unable to agree on whether there is one kind of intelligence, or several kinds. In the early 20th century, psychologist Charles Spearman came up with the concept of ‘g’ or ‘general intelligence’. He gave subjects a variety of different tests and found that the people who performed well in the tests used one part of the brain, which he called ‘g’, for all the tests. More recently, research has found that this idea may well be true, as one part of the brain (the lateral prefrontal cortex) shows increased blood flow during testing. However, some scientists believe that intelligence is а matter of how much people have learned rather than some ability they are born with. They believe that environment also matters.
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Complete the sentences. use the past continuous form of the verbs below. do look not listen swim wait watch 1 you for us? i’m sorry we’re late. 2 he his homework in the library at four o’clock. 3 could you repeat that, please? sorry, i . 4 which programme she on tv? 5 we near the beach when emma saw a shark. 6 they didn’t see the thief because they in the shop window.
2. was doing
3. was not listening
4. was watching
5. were swimming
6. were looking