[单项选择]The passage suggests that one major difficulty in establishing patterns of migration is


A. the infrequency of life course events, which restricts the amount of data available to demographers
B. the overwhelming availability of proxies in migration patterns, which creates a degree of stasis in migration records
C. the lack of parishioner birth records, which limits the hard evidence upon which demographers base their observations
D. the homogeneity of single parishes, which makes it difficult to distinguish the motivations of migrants
E. (E) the repetitive nature of migration, which results in a surfeit of unusable data that overwhelms demographers

[单项选择]The passage suggests that one major difficulty in establishing patterns of migration is
A. (A) the infrequency of life course events, which restricts the amount of data available to demographers
B. (B) the overwhelming availability of proxies in migration patterns, which creates a degree of stasis in migration records
C. (C) the lack of parishioner birth records, which limits the hard evidence upon which demographers base their observations
D. (D) the homogeneity of single parishes, which makes it difficult to distinguish the motivations of migrants
E. (E) the repetitive nature of migration, which results in a surfeit of unusable data that overwhelms demographers

[单项选择]

Passage One
One of the well-known of American writers is Samuel Clemens, whose pen name is Mark Twain. Born in 1835, Twain grew up in the Mississippi River town of Hannibal, Missouri. As did many other boys of his day, Twain dreamed of traveling on river boats and of someday becoming a riverboat pilot. Twain used his memories of the life of a river town in his two most famous books, Huckleberry Finn and Tom Sawyer.
As a young man, Twain held many jobs. He was a printer, a good miner, and, for a time, he was a riverboat pilot. During his pilot days, he adopted the name Mark Twain. This was a term used by the boatmen to mean that the water measured two fathoms, or twelve feet, which was deep enough for safe passage.
Finally Twain became a successful writer. He traveled a great deal, writing and speaking, and became very popular both in the United States and in Europe.
Twain’s style of writing was simple and direct. Among the things he wr
A. It came from a safe passage.
B. It came from a term used by the boatmen.
C. It came from his boyhood.
D. It came from his measuring tool.

[单项选择]

Passage One
One friend once said to me, "Do you know that most college students can’t even put semi-colons(分号) in the right place" Emphatic voices like his have recently made writing courses popular, strangely popular because of their hard-nosed attitude toward correct writing. Most administrators and teachers extend this medicinal metaphor (隐喻), they agree that students are suffering from a serious disease. Many tests identify increasing numbers of student writers as skills cripples (跛子), and they need treatment. Remedial courses are given everywhere. More writing labs are appearing and expanding.
Many students are willing to believe that there is really something wrong with them. More students than ever before tell me and my colleagues that they are indeed bad writers and need lots of help with grammar and punctuation. I feel like a doctor, my job is to diagnose (诊断) the disease and prescribe cures whenever I read student writing, I
A. doctor
B. patient
C. student
D. teacher