填空题

The market for (manufactured goods) is (which) economists call "imperfect," because each company has its own style; and all of the arts of advertisement and salesmanship are devoted (to making) it (even more imperfect) by attracting buyers to particular brand names.
  • A. manufactured goods
  • B. which
  • C. to making
  • D. even more imperfect

【参考答案】

B (改为: what)
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