问题
选择题
Giviog 22.up maker to go back to full time caudation was s a big________, but now I know was the best decision I ever made.
A．project
B．commitment
C．competition
D．ambition
答案
答案：B
考查名词。句意为：放弃工作去接受教育是一个巨大的挑战，竞争。