Mary is looking forward to _____ from me , please remember_______ this letter on your way to school .
A:hear ; send
B:hearing ; sending
C:hearing ; to send
D:hear ; sending
方程|1+x2|=|x|的解是( )
如图,四边形ABCD为⊙O的内接四边形,已知∠BCD=110°,则∠BAD=____度.