1. Consumer research can provide valuable information for companies ------ in designing new packaging for their products.
A) involved B) involving C) their involvement D) whose involvement
Answer: A
2. ------ are specialized satellites that will provide a virtually instantaneous overall view of the oceans in all parts of the world.
A) To the developments now B) Now being developed
C) Now that the developments D) Development now of
Answer: B
3. Naturally pink in a color, litmus turns blue in alkaline solutions and red in acids.
Answer: A
上述答案为标准答案,但是我不知道为什么.
先谢谢各位了!
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