The touch excites no defensive response unless the approach is from above where

游客2024-08-08  17

问题 The touch excites no defensive response unless the approach is from above where the spider can see the motion, ______ on its hind legs, lifts its front legs, opens its fangs and holds this threatening posture as long as the object continues to move.

选项 A、in which case it rises
B、in that case it rises
C、in which case does it rise
D、such being the case it rises

答案 A

解析 句意:这一触不会引起蜘蛛的防卫反应,除非它来自蜘蛛能看到的上方。在那种情况下,蜘蛛会后腿支撑,举起它的前腿,张开毒牙,只要猎物继续行动,它就一直保持这种威胁性的姿势。in which case这里是非限制性定语从句,指代前面整个句子,所以不用倒装。
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