_________ at the pool is my hobby.
A:Swim
B:Swimming
C:Swims
小张的奶奶出生于民国10年,这一年是( )
Where is your ball?____
如图所示,根据小磁针静止时的指向,标出通电螺线管的N、S极以及电源的“+、﹣”极.
Lu Yao is seven ________old.