2. 外语
  3. We have had to raise our prices because of the increase in the cost of______ materials.

We have had to raise our prices because of the increase in the cost of______ materials.

admin2014-09-24  22
问题 We have had to raise our prices because of the increase in the cost of______ materials.
选项 A、raw
B、crude
C、natural
D、original
答案A
解析 raw material"原材料"，固定搭配；crude"天然的，未加工的"，强调其粗糙；natural"自然的"，与人工的相对照；original"原始的，原文的"。
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