A:
B:
C:
D:
如图,AB为⊙O的直径,P为AB延长线上一点,PT切⊙O于T,若PT=6,PB=2,则⊙O的直径为( )
I am looking after little Tom today. He's been in my house _ 8:00 this morning.
下列词语中没有错别字的一项是( )