【题目】I have______ all my papers but I still can't find my notes,
A.looked through
B.looked for
C.looked after
D.looked out

【答案】A
【解析】look through 含义为“浏览”。根据其宾语all my papers可判断出句意是：我把全部文件都浏览了一遍也没有找到记的笔记。look for 含义为“寻找”；look after 含义为“照看”；look out 含义为“小心”。所以答案是A