You must follow the directions exactly and if you should become you must take the time to

问题补充：

You must follow the directions exactly, and if you should become you must take the time to back again and read them over.

A. confused

B. to be confused

C. to confuse

D. confusing

答案：

(答案→)A. confused

B. to be confused

C. to confuse

D. confusing

解析：句意，你必须完全按照指南办事，如果你清楚，你必须花时间重新再读一下。become是系动词，后面要用形容词或名词作表语，所以选A，困惑的，不明白的。