现代长颈鹿长颈的形成是下列哪项的结果 [ ]
A．人工选择
B．过度繁殖
C．遗传变异
D．自然选择
答案：D
He is always serious and doesn’t like _____.
A．play jokes
B．being played jokes on
C．being played jokes
D．to play joke on others
已满14周岁不满18周岁的人有违法行为的，（）行政处罚。
A、从轻
B、减轻
C、免除
D、不予
