Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

School exams are, generally speaking, the first kind of test we take. They find out how much knowledge we have gained. But do they really show how intelligent we are? After all, isn't it a fact that some people (34) _____ are very academically successful don't have any common sense.
Intelligence is the speed at which we can understand and react to new situations and it is usually tested by logic puzzles. (35) _____ scientists are now preparing advanced computer technology that will be able to "read" our brains, for the present tests are still the most popular ways of measuring intelligence.
A person's IQ is their intelligence as it is measured by a special test. The most common IQ tests are (36) _____ by Mensa, an organization that was found in England in 1946. People taking the tests are judged in (37) _____ to an average score of 100, and those who score over 148 are entitled to join Mensa. (38) _____ the questions are straightforward and most people can answer them if allowed enough time. But that's the problem; the whole point of the test is that they're against the clock.