13．Einstein used to say that the only gift he had was curiosity，but this story about him shows that he also had a sense of（16）A．
Einstein received many invitations to explain his theories（理论） at different universities．On these trips his（17）Cwas always the same-a man called Hans．Hans often said to him，"It's a pleasure to drive a talent like you，Dr．Einstein．"
One evening，on their way to a university far away，Einstein said，"I wish I didn't have to give my lecture（演讲） tonight，Hans．I'm so（18）B，but I don't want to let my audience down．"
"You（19）C give the lecture，"said Hans．"I can give it for you．I've listened to your lecture so many times that I've learnt it by heart．And （20）C knows you at this university，so they won't find out．"
Einstein（21）D Hans，so they changed places．At the university，Einstein took a seat in the audience，listened to Hans give his lecture perfectly，and joined in the applause（掌声） at the end．
However，（22）AHans left the platform（讲台），a professor shouted from the audience，"I'd like to ask you a difficult question．"
Einstein thought，"Oh no!Now we're （23）A．"But Hans just laughed and said，"That's not a difficult question．In fact，the question is so easy that（24）B my driver knows how to answer it．Hans，please…"
Einstein stood up and answered the question perfectly．
They left the university with Einstein driving．A little later，Hans（25）D to drive．"No，my friend，"laughed Einstein．"It's a pleasure to drive a talent like you，Hans．"
| 16．A．humour | B．direction | C．smell | D．hearing |
| 17．A．leader | B．reporter | C．driver | D．professor |
| 18．A．tiring | B．tired | C．interesting | D．interested |
| 19．A．mustn't | B．can't | C．needn't | D．couldn't |
| 20．A．someone | B．everyone | C．nobody | D．anyone |
| 21．A．argued with | B．fought with | C．dealt with | D．agreed with |
| 22．A．before | B．after | C．until | D．since |
| 23．A．in trouble | B．out of trouble | C．in fear | D．out of fear |
| 24．A．once | B．even | C．usually | D．always |
| 25．A．disagreed | B．refused | C．failed | D．offered． |
