| Q22:
Of the books standing in a row on a shelf, an atlas is the 30th book from the left and the 33rd book from the right. If 2 books to the left of the atlas and 4 books to the right of the atlas are removed from the shelf, how many books will be left on the shelf?
A. 56
B. 57
C. 58
D. 61
E. 63
请教这题，答案是A,为什么我算出的是57呢？（30-2）+(33-4)=57. | 
