He needs more paper _________.
A:to write on
B:to write
C:writing
D:writing on
Bob likes pictures. He can very much.
若以高茎的豌豆和矮茎的豌豆杂交,后代全是高茎,则下列叙述中正确的是( )
— ________ is your new bike?
— I ________ about 900 yuan for it.
如图,已知⊙O的半径为5,锐角△ABC内接于⊙O,BD⊥AC于点D,AB=8,则tan∠CBD的值等于( )