She recognized him because of the hat. He was standing with his back to her on a cliff ________ out across a dark sea.

A．to look

B．looking

C．look

D．looked

学生为了得到家长和老师的赞许而学习，这属于哪种学习动机[ ]

A．附属内驱力

B．认知内驱力

C．自我提高内驱力

D．成就内驱力