问题
We all know that we’ll meet all kinds of difficulties in our lives in the future. We should learn to be ________ any challenge!
A:confident enough to take on
B:active enough to take up
C:enough careful to take try on
D:enough patient to try out;
B:active enough to take up
C:enough careful to take try on
D:enough patient to try out;
正确答案是：
