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题目：

The primary purpose of the passage is to

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题目：

In the context of the passage, the phrase "fossils of a predicted kind" (highlight) most likely refers to which of the following?

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题目：

Which of the following is mentioned in the passage as an argument made by scientists who are unconvinced that birds evolved from theropod dinosaurs?

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题目：

The primary purpose of the passage is to

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题目：

According to the passage, one source of dissatisfaction for Parisian seamstresses after the establishment of the seamstresses' guild was that

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题目：

It can be inferred from the passage that which of the following was true of seamstresses employed by relatives who were members of the tailors' guild?

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题目：

The author mentions the seamstresses' view of guild membership as a "mark of independence from the patriarchal family" (highlighted text) primarily in order to

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题目： If $$2^{2x – 1} = 8^{y}$$ then x in terms of y equals:

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题目： Lindsay can paint $$\frac{1}{x}$$ of a certain room in one hour. If Lindsay and Joseph, working together at their respective rates, can paint the room in one hour, what fraction of the room can Joseph paint in 20 minutes?

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题目： If x + y = 3, and $$x^{2} – y^{2} = 12$$, what is the value of x – y?

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题目： Which of the following is the second greatest?

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题目： If $$x^{2} – 4x = 5$$, then one possible value of x – 4 =

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题目： Two circles share a center at point C, as shown to the right. Segment AC is broken up into two shorter segments, AB and BC, with dimensions shown. What is the ratio of the area of the large circle to the area of the small circle ?

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题目： Two buses and a van were employed to transport a class of students on a field trip. $$\frac{3}{5}$$ of the class boarded the first bus. $$\frac{2}{3}$$ of the remaining students boarded the second bus, and the rest of the students boarded the van. When the second bus broke down,$$\frac{ 1}{2}$$ of the students on the second bus boarded the first bus. What fraction of the class was on board the first bus?

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题目： If a and b are positive integers and$$ x = 4^{ a} and y = 9^{ b}$$, which of the following is a possible units digit of xy?