Don’t the birds． Listen to the teacher carefully．
A. look
B. look out
C. look out of
D. look out at
网友回答
A. look
B. look out
C. look out of
(答案→)D. look out at
解析：look看；look out 注意，当心；look out of 向外看，看……的外面；look out at向外看某物。句意：不要向外看鸟。认真听老师讲课。结合语境可知选D。