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.
17（）
A.questioned
B.wondered
C.noted
D.found
参考答案：B
解析：
[试题考点] 上下文语意关系和动词词义辨析。
[解题思路] 本题空格处需填入一个动词，作渭语，其后紧跟由if引导的宾语从句。四个选项中，能接if引导的宾语从句的只有选项[A]questioned和选项[B]wondered。《麦克米伦高阶英汉双解词典》对question的英文解释为to have or express doubts about something(质疑；对……表示怀疑)，含有不相信某事的意味，代入文中，显然，研究者不会“质疑”自己的某个实验课题。wonder的英文解释为to think about something because you want to know more facts or details about it(疑惑；想知道)，含有怀疑某事存在的意味，代入文中，意为“研究者们怀疑这两种基因与母乳奶产生了不同的作用”，语意通顺，故选项[B]正确。
[干扰排除] 选项[C]noted意为“注意；做笔记；记录”，选项[D]found意为“发现；找到”，二者后都不能跟if引导的宾语从句，且代入文中，语意也不通顺，故排除。