Section C
1. We can use the Internet for finding jobs.
Use sth. for doing sth. = use sth. to do sth. 用某物去做某事
2. But we shouldn’t spend too much time on the Internet.
Sb. spend some time/ money (in) doing sth. 某人花费时间或金钱做某事
Sb. spend some time/ money on sth. 某人花费时间或金钱在某事物上
3. The words in dictionaries are in alphabetical order.
in alphabetical order 按字母顺序 ；in… order 表“以…. 的顺序”如： Put the words in the right order.
4. look up 查找，可以说“look up a word”或“look up a word in a dictionary” 但不能说look up a dictionary
5. pay attention to (doing ) sth. 注意（做）某事。to 在此为介词。
6. begin with = start with 以…开始； end with 以… 结束
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