比如想从A改到B， 不能涂掉A，要涂上B, 后面的空格上写上“B"

试题册上可以打草稿，不会单独发草稿纸

请问楼上关于改答案的方法是否有官方说法的链接？

How do I change an answer on the Answer Sheet?
If you want to change your answer to a question on the Exam, you must complete the Final Answer column. For example, if you fill in bubble A for an answer, and then decide that you want to change that answer to C, DO NOT ERASE your initial answer. Leave bubble A filled in and then ALSO fill in the bubble for C. Then you will ALSO need to write the letter C in the column marked Final Answer on the Answer Sheet.

Do not write in a letter for every question in the Final Answer column, just the one you are changing. Please observe the poster of how to correctly change your answer that is displayed in the Exam room. Answer Sheets that are not completed correctly may cause a delay in your results.

填错的话不需要擦除，填在对的答案上 （意思是有两个泡泡是filled的），然后在空格上写上你正确的答案
所以后面的空格是让你改答案用的，如果没填错就把那空格留白
加油

谢谢分享。