Question

the boy knows so much at his age. i ( )at

the boy knows so much at his age. i ( )at his learning.

Answer 1

The boy knows so much at his age. I wonder at his learning.

短语：
wonder at 对…感到吃惊
例句： Then comes the snow, and we once again wonder at how it transforms the familiar objects of our everyday world.
当雪花飘下,我们再一次地惊叹,它是如何改变了我们世界中所熟悉的一切