When I reached home, my husband was lying on the floor, ________ the kids with toys.

A．to entertain

B．entertains

C．entertaining

D．entertained

既能扩张支气管平滑肌，又能减轻支气管粘膜水肿的药物是

A．肾上腺素
B．吗啡
C．异丙肾上腺素
D．特布他林
E．氨茶碱