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题库 / Prep2012-SC-46
While recognizing that lying often facilitates social interactions, psychiatrists are seeking to determine when they become destructive and which kinds of mental problems they can signal.
they become destructive and which kinds of mental problems they can signal
they become destructive and the mental problems that are signaled by them
it becomes destructive and what are the kinds of mental problems they signal
it becomes destructive and the mental problems that are signaled by it
it becomes destructive and which kinds of mental problems it can signal
题目分析：
本题用代词的不同体现出了become的主语的变化。在(A)(B)中，become的主语为代词they，其指代对象只能为复数名词social interactions；在(C)(D)(E)中，其主语为代词it，其指代对象只能为单数名词lying。同样地，signal的主语也有这样的变化，(A)(B)(C)中为they（social interactions）；(D)(E)中为it（lying）。变得具有破坏性（become destructive）的东西肯定是“lying（说谎）”，而不是“social interactions”。同样地，能暗示精神问题（signal mental problems）的肯定也是“lying(说谎)”，而不是“social interactions”，可以排除(A)(B)(C)
另外，在(E)中，具有and关系的两者是when和which（what）这两个问题，在(D)中，具有and关系的两者是destructive和the mental problems。在逻辑上，具有and关系的两者应该是determine后的两个问题，即when和which（what），而不可能是destructive和the mental problems，可以排除(D)，答案为(E)。
选项分析：
略
在逻辑上，具有and关系的两者应该是determine后的两个问题，即when和which（what），而不可能是destructive和the mental problems，可以排除(D)，答案为(E)。
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