问题
选择题
I wrote a letter of complaint, and the airline has promised to _____ the matter.
A．look up
B．look into
C．look through
D．look for
答案
答案：B
考查动词短语辨析。Look up查找；look into调查；look through浏览；look for寻找；句意：我写了一封投诉信，航空公司允诺调查此事。