单选题 The manager promised to have my complaint ______.
A. looked through B. looked into C. looked over D. looked after

【正确答案】 B

【答案解析】本题考查动词短语辨析。该句意为“经理答应对我的投诉进行调查”。四个选项的意思分别为：look through“(从头至尾)浏览，详尽核查”；look into“调查，观察”；look over“把……看一遍，把……过目，察看，参观”；look after“照料，注意，关心”。所以look into(=investigate)符合题意。