问题
选择题
Giving up my job to go back to full-time education was a big __________, but now I know it was the best decision I ever made.
A．project
B．commitment
C．competition
D．ambition
答案
答案：B
考查名词辨析。根据句子的“现在我知道这是最好的决定”，可知，放弃工作重新参加全职教育是一个很大的投入。故答案选B.