问题补充:
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:
A. look up
(答案→)B. look into
C. look through
D. look for
解析: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。