3. through/ throughout

　　(1)through: “穿过”(某一具体物体) eg: through the earth

　　“通过”(某一具体方式)=by eg: through X-ray analyses

　　例题：

　　(Although) fluorine氟 (tests) and x-ray analyses, archaeologists (can prove) the (validity)合理性 of artifacts.

　　答案: A althoughàthough

　　(2)throughout +时间，“贯穿” eg: throughout his lifetime

　　(Throughout) the 1930’s, United States government (patronage the) arts (was concentrated) in the section of the Works Progress Administration (known as) Federal One.

　　答案: B patronage theà patronage to the

　　thoughout+地点，“遍佈” eg: throughout the world

　　例题：

　　(Serving) as chief of the United States Children’s Bureau from 1921 to 1934, Grace AbBott (fought) for the (rights) of women and children (through) the world.

　　答案: D throughàthroughout

　　4. in, inside /into

　　in, inside 表示静态，强调一种状态 eg: air inside a house

　　into 表示动态，强调一种动作和过程 eg: shot arrows into the sky

　　(There is) evidence that the caribou originated (into) North America and crossed (over) a land bridge into Asia and (evolved) into the Old World’s reindeer.

　　答案: B intoàin