[单项选择]These programmes are of immense value to old people.
A. natural
B. fatal
C. tiny
D. enormous

[单项选择] Theseprogrammes are of immense value to old people.
A. natural
B. fatal
C. tiny
D. enormous

[单项选择]These programs are of immense value to old people
A. natural
B. fatal
C. tiny
D. enormous

[单项选择]These programmes are of immense importance to the young students.
A. natural
B. fatal
C. slight
D. enormous

[单项选择]These programmes are of {{U}}immense{{/U}} value to old people.
A. natural
B. fatal
C. tiny
D. enormous

[单项选择]Anna Douglas understands the problems of old people ______.


A. because she likes their music
B. because she has grandchildren
C. because she watches their television programs
D. because she is old herself

[单项选择]Different ways of life exist among different peoples because of______.


A. their adaptive value
B. their distinctive value
C. lack of better technology
D. mutual isolation

[单项选择]In deciding to undertake dangerous pursuits, people (usually strive) for their maximum personal ability rating, (when) they (are challenged) but can be victorious, rather than merely (surmounting the mediocre).
A. usually strive
B. when
C. are challenged
D. surmounting the mediocre

[单项选择]Social etiquette in the United States allows people to ______.
A. be a few minutes late for interviews
B. be up to a half-hour late for some parties
C. keep a friend waiting for less than 30 minutes
D. come a few minutes earlier to any appointment

[单项选择]

Text 2
Dietary studies have suggested that people who consume large amounts of vitamin A in foods, multi vitamins, or both are more likely to suffer hip fractures than are people who ingest modest amounts.
New evidence bolsters these findings. Researchers have now correlated men’s blood concentrations of vitamin A with a later incidence of broken bones: a comparison that avoids the vagaries that plague diet-recall studies.
Taken together, the new work and the diet studies raise knotty questions about the maximum amount of vitamin A that a person can safely ingest each day, says study coauthor Karl Michasson, an orthopedic surgeon at University Hospital in Uppsala, Sweden. He and his colleagues report the new findings in Jan. 23 New England Journal of Medicine.
In the United States, the average daily intake of vitamin A through food, specially fish, eggs, and meat, is roughly 2,600 IU (international units) for men, and many multi-vitami
A. A．elderly people are slow in digesting vitamin