Many scientists remain ______ about the value of this research program.

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问题 Many scientists remain ______ about the value of this research program.

选项 A、spacious
B、stationary
C、specific ’
D、skeptical

答案D

解析 skeptical怀疑的,不相信的;spacious广阔的,宽敞的,广大的;stationary不动的,静止的;specific明确的,确切的,特定的。句意:许多科学家对他的研究计划持怀疑态度。
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