Reading in the sun is to your eyes.A. hopelessB. harmfulC. harmlessD. careless

问题补充：

Reading in the sun is to your eyes.

A. hopeless

B. harmful

C. harmless

D. careless

答案：

A. hopeless

(答案→)B. harmful

C. harmless

D. careless

解析：hopeless 绝望的，不可救药的；harmful有害的；harmless 无害的，无恶意的；careless粗心的，淡漠的。句意：在阳光下读书对你的眼睛有害。结合语境可知选B。