问题
选择题
We spent many years studying the formation of rocks ,.experiencing many sufferings and even dealth .But our hard work _____in the end, and we made it.
A．paid off
B．paid back
C．given away
D．came out
答案
A
pay off成功;得到回报。“最后我们的努力得到了回报, 我们成功了”。