小题1: If you lost your backpack, you may call_____ 

A．Linda

B．Karen

C．Nick

D．Tim小题2:Who lost his school ID card , 

A．Tony

B．Nick

C．Linda

D．Karen小题3:If you want to find your set of keys, Please call___

A．Karen

B．Nick

C．Tim

D．Tony小题4:Tony’s school ID card is lost, his telephone number is _____

A．8793568

B．8572360

C．8973658

D．8973568

以上四点中，（）不是航空运输的局限性.

A、投资大

B、运量小

C、容易受天气影响

D、装卸麻烦