问题
选择题
We were badly treated in the hospital.
Don’t worry.The president has promised to ______ your complaint at once.
A．look up
B．look into
C．look back on
D．look forward to
答案
答案：B
考查短语辨析。look up 查字典，look into 调查，look back on 回顾，look forward to 期望，句意：在医院我们被对待的不好，别担忧，院长已经答应了马上调查你的抱怨。所以选B。