After reading for an hour youd better the green trees for a minute or two.A. look out of

问题补充：

After reading for an hour, youd better the green trees for a minute or two.

A. look out of

B. look out at

C. look out from

D. look for at

答案：

A. look out of

B. look out at

C. look out from

D. look for at

解析：句意：读书过了一个小时后，你最好向外看一会儿绿树。A. look out of 从……向外看； B. look out at 向外眺望； 选项CD搭配不对；根据句意故选B。