如图,在Rt△ABC中,∠A=90°,BD平分∠ABC,交AC于点D,若AB=4,且点D到BC的距离为3,则BD=____.
I don't know if she ____________ if it _____________ tomorrow.
下列句子中划线成语运用不正确的一项是( )
You'd better____ ____the room before the guests arrive.