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.
16（）
A.suspected
B.doubted
C.disapproved
D.challenged
参考答案：A
解析：
[试题考点] 上下文语意关系和动词词义辨析。
[解题思路] 本题空格所在句句意为“该团队______一种名为FADS2的基因的参与”。空格处需要填入一个动词作谓语。下文中谈到了这种基因与母乳如何相互作用从而影响智力，由此可推知，空格后的内容应该是该团队研究的对象。将四个选项代入文中，只有选项[A]suspected符合文意，suspect在此处意为“推测；猜想”。
[干扰排除] 选项[B]doubted意为“怀疑；不信任”，选项[C]disapproved意为“不赞成；不同意”，选项[D]challenged意为“质问；怀疑”，根据解题思路中的分析可知，此处应填入一个可以表明空格后为该团队研究内容的动词，这三项都不能表明这一含义，故排除。