【题目】The reason why he adapted to the new situations quickly is that he had a ________ attitude.
A. changeable B. stable C. movable D. flexible
在线课程【答案】D
【解析】考查形容词辨析。changeable可变的，易变的；stable稳定的；movable活动的，可移动的；flexible灵活的，可变通的。句意：因为他有灵活的态度，所以他迅速适应了新形势。迅速适应新形势的原因是他有灵活的态度，故选D。