[多项选择]English has kinship terms and distinguishes some characteristics in relatives: ______.
A. blood relationship
B. seniority
C. generation
D. sex

[填空题]The kinship terms "grandfather", "grandmother", "grandson", "granddaughter" and others show that the distinction between （　） and maternal relatives is often ignored in English.

[单项选择]Some research has shown that perhaps eighty percent of cancer is related to the diet as well, especially cancer of the colon (结肠).（）
A. 一些研究表明80%的癌症，特别是结肠癌，也和人们饮食有关。
B. 一些研究表明80%的癌症，特别是结肠癌，也和人们节食有关。
C. 一些研究表明80%的癌症，特别是结肠癌，人们节食就不会得。
D. 80%研究体现癌症，特别是结肠癌与人们饮食有关。
E. 80%研究证明人们节食就不得癌症，特别是结肠癌。

[简答题]Some terms used in job titles 职位称呼

[填空题]What progress has African countries made in terms of business reform

[单项选择]

Some people talk about immigration in terms of politics, some in terms of history. But the core of the matter is numbers. The Labor Department says that immigrants make up about 15 percent of the work force. It’s estimated that a third of those are undocumented workers. The Pew Hispanic Center estimates that one in four farmhands in the United States is an undocumented immigrant, and that they make up a significant portion of the people who build our houses, clean our office buildings and prepare our food.
America has become a nation dependent on the presence of newcomers, both those with green cards and those without. Business leaders say agriculture, construction, meatpacking and other industries would collapse without them.
Sure, it would be great if everyone were here legally, if the immigration service weren’t such a disaster that getting a green card is a life’s work. It would be great if other nations had economies robust enough to support
A. 15 percent
B. one third
C. 4.5 percent
D. one in four