单选题

• 1、

  In times of economic difficulty, corporate budgets

• 2、

  Their {{U}}sole{{/U}} fault was a failure to recog

• 3、

  A writer's attempts to reproduce folk {{U}}speech{

• 4、

  Eyespots, the most {{U}}rudimentary{{/U}} eyes, ar

• 5、

  The song "Yankee Doodle" was originally sung by Br

• 6、

  The Sun Dance is considered by many to be the most

• 7、

  The first watermill was horizontal and resembled a

• 8、

  The main characters of Horatio Alger's books alway

• 9、

  The gar is a fish with a long, {{U}}slender{{/U}}

• 10、

  Scientists {{U}}routinely{{/U}} deal with concepts

• 11、

  The earliest kind of desk was a box that had a {{U

• 12、

  Generally, a material with a {{U}}sour{{/U}} taste

• 13、

  Extending from Quebec to Alabama, the Appalachian

• 14、

  {{U}}Rival{{/U}} traditions of acting have coexist

• 15、

  Hoof-and-mouth disease was eliminated in the Unite