A:11
B:13
C:17
D:19
计算:﹣4+3=( )
——Did the book give the ___________ you needed?——Yes. But ____________ it, I had to read the whole book.
古往今来,许多仁人志士“先天下之忧而忧,后天下之乐而乐。”影响他们的情绪变化的因素主要是( )