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.
1. Her children are in the yard. They are playing football now. They have been playing it since 10 o'clock.
2. speaks/ have been studying/is speaking
3. has just returned
4. Where is David/is/ is working/ have been working
5. looks/ has been working
I'm in town. - я в городе (т.е. не в деревне)
2. computer game
3. mirror
4.armchair
5.computer
6.football team
7.clock
8. bed
Started to, she, the. has, on, of, ago