单选题 The meat packing industry is focused on producing meat for human consumption, but it also yields a ______ of by-products such as hides and feathers.
  • (A) varies
  • (B) various
  • (C) vary
  • (D) variety


【正确答案】 D
【答案解析】[理由] 本句测试下列固定短语：
a variety of+复数名词各式各样的……
=various kinds of+复数名词
[例] These soldiers come from a variety of backgrounds.
(这些士兵有形形色色的背景。)
根据上述，(D)应为正选。
(A)varies为vary的第三人称单数现在式
以上3项置入空格皆不合乎用法，故不可选。