There is in today's magazine.
A：new something
B：nothing new
C：new nothing
D：anything new
1，3，5，7，____，____，13
3，6，____，12，15，____
95，90，85，____，____，70
Parents should pay attention to the cases _______ their children have difficulty adapting to new surroundings.
小明读一本课外书，前6天每天读25页，以后每天多读15页，又经过4天正好读完，这本课外书有多少页？
