Few scientific fields are as full of risk as that of research into human intelligence. The two questions that (1) over and over again are "is it a result of nature or nurture" and "does race make a difference"
Making (2) comments about the second question can be a (3) move, as James Watson, a co-discoverer of DNA structure, recently found. He suggested that he was " (4) about the prospect of Africa" (5) "all our social policies are based on the fact that their intelligence is the same as ours (white people) (6) all the testing says not really". Such (7) by Dr. Watson are not merely (8) , they are scientifically weird. If the term (9) has any useful scientific meaning, then Africa, the continent where modern humanity began, is most racially diverse. The resulting (10) among the public forced Dr. Watson to leave his laboratory.
(11) , the study of the first question (12) between intelligence and genetics— has some wiser practitioners. One of them, Terrie Moffitt, of King’s College, has just (13) a project judging the relative importance of nature and nurture. Dr. Moffitt’s team (14) the effect on intelligence of breastfeeding, but in a genetic context. Previous studies have shown that breastfed children are more intelligent, (15) about six IQ points, than those given baby formulas.
The team, however, (16) the involvement of a gene called FADS2, which comes in two varieties, known as C and G. The researchers (17) if these two varieties interacted differently with breast milk. (18) on data from two groups of people, they found that the intelligence increase associated with breastfeeding only happened to people having (19) at least one copy of the C variety. The effect did not. (20) on the social classes or IQs of the parents.
14（）
A.had
B.examined
C.discovered
D.suggested
参考答案：B
解析：
[试题考点] 上下文语意关系与动词词义辨析。
[解题思路] 本题空格所在句句意为“Moffitt的团队______母乳喂养对智力的影响”，空格处需要填入一个动词作本句的谓语，将各个选项代入文中，只有选项[B]examined和选项[C]discovered符合文意，但根据下文可知，以前人们就进行过有关母乳喂养对智力影响的研究(Previous studies...)，本题空格若填入discover(发现)则表达的意思为“该团队发现了这一影响”，这种说法不合逻辑，故排除。相较而言，选项[B]examined(检测；测试)更符合上下文文意。
[干扰排除] 选项[A]had(有)以及选项[D]suggested(表明；暗示)代入空格，均不符合文意，可排除。