itwaswrittenpage10youshouldn'twriteanythingalibrarybookAon,inBin,onCin,inDon,on

Question

it was written__page 10
you shouldn't write anything ___a library book
A on ,in
B in,on
C in,in
D on ,on

Answer 1

A
on the page 在某页
in the book 在书里