It’s bad for our eyes to read books the sun. A. toB. underC. inD. over

问题补充：

It’s bad for our eyes to read books the sun.

A. to

B. under

C. in

D. over

答案：

A. to

B. under

(答案→)C. in

D. over

解析：句意；在太阳下看书对眼睛不好。A向，往，到B在下面C在里面D在上方in the sun为固定短语在太阳下，沐浴在阳光中。