2. 外语
  3. Alternative sources of protein must be found when meat and fish are not available.

Alternative sources of protein must be found when meat and fish are not available.

admin2011-01-06  87
问题 Alternative sources of protein must be found when meat and fish are not available.
选项 A、New
B、Less expensive
C、More
D、Other
答案D
解析 alternative与other同义，意为“其它的”。
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