His pronunciation is better, for he kept ______ a short passage after the tape every morning.
A:to read
B:reading
C:read
D:reads
古人之观于天地、山川、草木、虫鱼、鸟兽,往往有得,____。(王安石《游褒禅山记》)
如图,在▱ABCD中,用直尺和圆规作∠BAD的平分线AG交BC于点E.若BF=6,AB=5,则AE的长为( )