<thead id="e1qbk"></thead>
Whichnumbershouldbefilledintheblank? 8?
7+3是5的二倍23+4是9的三倍則8+？是2的四倍？=0
應該是0吧/{？_？}
0,i'm sure 0
the answer is zero...
?問號是0
6?
