If 70 percent of 8-year-olds could pass a particular test, then 29 on the test represented an 8-year-old’s level of intelligence.
答案：(A) success
success on the test 指「在該測驗上取得的成功」，是前半條件句 could pass a particular test 的同義改寫；objection（反對）、agreement（同意）、discovery（發現）與通過測驗都無關。
答對率 24%。程度好與程度弱的人表現幾乎一樣，代表大家都在猜。
success 這個字沒有人不認得，難的是它在句中的位置——它是主詞。你可能習慣把抽象名詞當受詞用（achieve success），較少看到它單獨當主詞（Success on the test represented…）。看到空格後面直接接介系詞片語與動詞，反而不敢確定。
完整句是 If 70 percent of 8-year-olds could pass a particular test, then ___ on the test represented an 8-year-old's level of intelligence.（若七成的八歲兒童能通過某項測驗，那麼在該測驗上的「通過」就代表八歲兒童的智力水準）。條件子句裡的 could pass 與空格要填的字是同一件事的兩種說法——pass 是動詞，success 是它的名詞版。看到 if 子句與主要子句在講同一件事，先找有沒有同義改寫，答案往往就在對面那半句。
objection（反對）、agreement（同意）、discovery（發現）三個字與「通過測驗」毫無語意連結，只要抓住 pass 這個線索就能全部排除。這也說明為什麼這題大家都在猜——它其實不難，難在多數人沒有回頭對照條件子句的習慣。
success on／in a test（測驗上的成功）、succeed in doing（成功做到）、a key to success（成功的關鍵）、pass／fail a test（通過／未通過測驗）。
French psychologist Alfred Binet (1859-1911) took a different approach from most other psychologists of his day: He was interested in the workings of the 26 mind rather than the nature of mental illness. He wanted to find a way to measure the ability to think and reason, apart from education in any particular field.
In 1905 he developed a test in which he 27 children do tasks such as follow commands, copy patterns, name objects, and put things in order or arrange them properly. He later created a standard of measuring children's intelligence 28 the data he had collected from the French children he studied. If 70 percent of 8-year-olds could pass a particular test, then 29 on the test represented an 8-year-old's level of intelligence.
From Binet's work, the phrase "intelligence quotient" ("IQ") entered the English vocabulary. The IQ is the ratio of "mental age" to chronological age times 100, with 100 30 the average. So, an 8-year-old who passes the 10-year-old's test would have an IQ of 10/8 times 100, or 125.