更多"Once these were solved, the railroa"的相关试题:
[单项选择]Digital cameras once were luxuries for most families, but they are______available in recent years.
A. instantly
B. readily
C. quickly
D. promptly
[单项选择]Dolphins once were hunted for money because______.
A. they are rare and precious animals
B. valuable oil can be obtained form their head
C. they can produce oil for lubrication
D. they are able to utter sounds worth study
[单项选择]Those countries were once worried that they would not have adequate supplies ofpetroleum.
A. effective
B. efficient
C. potential
D. sufficient
[单项选择]The European Union countries were once worried that they would not have __________ supplies of petroleum.
A. proficient
B. efficient
C. potential
D. sufficient
[单项选择]Molds were once used only for small amounts of fat, shared with neighbors at cooperative candle clippings or supplied by______candle makers who canvassed large geographical areas.
A. (A) redoubtable
B. (B) impecunious
C. (C) sententious
D. (D) meretricious
E. (E) itinerant
[单项选择]Cowries shells were once in widespread use as a token of value.
A. a symbol
B. an amount
C. a thing
D. an investment
[单项选择]Some deserts were once ______.
A. very good lands
B. covered by ice
C. very cold
D. dry and useless