34．Hardly_________the phone           I was told that the hotel had been booked full．

A．I had picked up；when

B．had I picked up；then

C．had I picked up；when

D．I had picked up；then

治疗慢性反复发作的支气管哮喘，下列哪项措施不常规使用（）

A.避免接触过敏原

B.脱敏治疗

C.糖皮质激素气雾剂吸入

D.注射长效糖皮质激素

E.色甘酸钠吸入