Time for another global-competitiveness alert. In the Third International Ma

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问题 Time for another global-competitiveness alert. In the Third International Mathematics and Science Study—which last year tested a half-million students in 41 countries—American eighth graders【C1】______below the world average in math. And that’s not even【C2】______part. Consider this as you try to【C3】______which countries will dominate the technology markets of the 21st century: the top 10 percent of America’s math students scored about the same as the average kid in the global【C4】______, Singapore.
It isn’t exactly a news flash these days【C5】______Americans score behind the curve on international tests. But educators say this study is【C6】______because it monitored variables both inside and outside the classroom. Laziness—the factor often【C7】______for Americans’ poor performance—is not the culprit here. American students【C8】______spend more time in class than pupils in Japan and Germany. 【C9】______, they get more homework and watch the same amount of TV. The problem, educators say, is not the kids but a curriculum that is too【C10】______. The study found that lessons for U. S. eighth graders contained topics mastered by seventh graders in other countries.
Teachers actually agree that Americans need to【C11】______their kids to more sophisticated math earlier. Unfortunately, experts say, the teachers don’t recognize that【C12】______these concepts are taught is as important as the concepts themselves. Most educators rely【C13】______on textbooks and rote learning (死记硬背). While many textbooks cover【C14】______ideas, most do so superficially,【C15】______students with the techniques but not the mastery of the broader principles. [br] 【C5】

选项 A、what
B、where
C、when
D、that

答案 D

解析分析句子结构可知，It是形式主语，真正的主语是——Americans score behind the curve on international tests，此处需要主语从句的引导词，根据全句意思“在国际数学测试中美国学生成绩落伍已经不再是什么新闻了”可知，关系代词指代“美国学生成绩不好”这件事情。A项what可以做关系代词，但是意思一般是“什么或者一切”；B项where是关系副词，表示地点；C项when是关系副词，表时间；D项that是关系代词。因此本题选D。

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