第26题: [单项选择]The two psychologists had to modify the American Sign Language somewhat in order to accommodate the chimpanzees' spontaneous gestures. A. change B. abort C. shorten D. enhance 参考答案:A 答案解析:change改变,变化,转变。abort异常中断,中途夭折。shorten缩短。enhance提高,增强。modify修改,更改。