a. change

　　b. investigate

　　c. understand

　　d. write

　　答案：c

　　请看下面几句中的follow 分别都是什么意思?

　　she went into the building, followed by a group of students.

　　the teacher says that everybody should follow the rule here.

　　i’m sorry, but i can’t follow you.

　　六、几组对容易混淆词进行特别记忆

　　(1)有些字可当形容词又可当副词,例如： early; past; half; long; straight; fast; hard; quick; deep; slow; pretty; awful; wrong; right; high; late; hourly; early; weekly; etc.

　　we had an early breakfast. (形容词)

　　we went by a fast train. (形容词)

　　we had breakfast early. (副词)

　　don’t speak so fast.(副词)

　　(2)有些形容词变为副词, 可在字尾加ly, 也可以不加, 不过在字义上不同。

　　(a) easy “安适地”; easily “容易地”：

　　stand easy!

　　he’s not easily satisfied.