Question

She ______ his number in the phone book to make sure that she had got it right.

.She ______ his number in the phone book to make sure that she had got it right.
A. looked for B. looked up

为什么不选择A呢？？不明白，大家详细解释一下

Answer 1

look for 寻找
She is looking for her lost child.
她正在寻找失去的孩子。

look up 查询
If you don't know a word, you can look it up in a dictionary.
如果你有不识的字,可以查字典。
所以呢 这题选B

Answer 2

look up是查阅的意思，是从一些事物中找出来，而look for是寻找的意思，没有一个固定的范围，此题是从电话本中找出一个号码，所以选look up

Answer 3

look up一般在已知或已有的东西里查找
look for一般在未知或未有的东西里寻找
例如：
1. look up
If you don't know a word, you can look it up in a dictionary.
如果你有不识的字,可以查字典。
2.look for
She is looking for her lost child.
她正在寻找失踪的孩子

Answer 4

固定搭配，通常要表达查阅字典、单词、号码等都用look up
look up有查阅的意思，常用look sth. up in
look for 则多指寻找，没有查阅的意思

记住就好了，翻译成中文都有寻找的意思，用的地方不同罢了

Answer 5

look for 不一定找到,look up 表示已找到.