121学好一门功课是费时间的。你不要期望在短期内创造奇迹。(take, wonder)
It takes time to learn a subject well. You can’t expect to work/do wonders in a short time.
122我的家乡发生了这么大的变化，我都认不出它来了。(such…that)
Such great changes have taken place in my hometown that I can hardly recognize it.
