6．
（One day Alice runs after a strange rabbit and comes into a deep hole．She
becomes smaller when she wakes up the next day．She finds herself in a
wonderland with many amazing things inside．）
The Caterpillar（毛毛虫） and Alice looked at each other for some time in
silence．At last the Caterpillar took the pipe out of its mouth，and said to her in
a tired，sleepy voice．
"Who are YOU？"said the Caterpillar．
This opening for a talk couldn't make Alice at ease．Alice replied，rather shyly，"I-I hardly know，sir，just at present-at least I know who I was when I got up this morning，but I think I must have been changed several times since then．"
"What do you mean by that？"said the Caterpillar，"Explain yourself!"
"I can't explain MYSELF．I'm afraid，sir．"said Alice，"because I'm not myself，you see．"
"I don't see．"said the Caterpillar．
"I'm afraid I can't put it more clearly．"Alice replied very politely，"For I can't understand it myself．And being so many different sizes in a day is very puzzling．"
"It isn't．"said the Caterpillar．
"Well，perhaps you haven't found it so yet．"said Alice．"But when you have to turn into a chrysalis（蛹，茧）-you will some day，you know-and then after that into a butterfly，I think you'll feel it a little stranger，won't you？"
"Not a bit．"said the Caterpillar．
"Well，perhaps your feelings may be different．"said Alice．"All I know is，it would make ME feel very strange．"
"You!"said the Caterpillar scornfully．"Who are YOU？"The question brought them back again to the beginning of the talk．Alice felt a little angry because the Caterpillar was making such VERY short sentences．She drew herself up and said very seriously，"I think you ought to tell me who YOU are first．"
"Why？"said the Caterpillar．
Here was another puzzling question．As Alice could not think out any good reason，and as the Caterpillar seemed to be very unpleasant，she turned away．"Come back!"the Caterpillar called after her．"I've something important to tell you!"
This certainly gave Alice some hope．Alice turned and came back again．
48．Why did Alice think she was not herself？B
A．Because she was too young to understand the changes．
B．Because being changed several times in a day made her feel puzzled．
C．Because she didn't like her changes．
D．Because she didn't feel very well．
49．Put the following statements in the correct order according to the story．D
①Alice drew herself up．
②Alice used an example to explain the changes to herself．
③Alice couldn't explain herself．
④Alice turned away．
⑤Alice looked at Caterpillar for some time in silence．
A．⑤②③④①
B．⑤②③①④
C．⑤③②④①
D．⑤③②①④
50．Which of the following sentences can be added to the end of the story？B
A．"Don't be silly．You are still yourself．"said the Caterpillar．
B．"Don't be angry．You think you're changed，do you？"said the Caterpillar．
C．"Don't be sad．You'll grow bigger again．"said the Caterpillar．
D．"Don't be afraid．You can go home now．"said the Caterpillar．
In the 1920s and 30s the airlines were just beginning．It was unusual for people to travel by air because it was expensive and dangerous．In those days，there were no flight attendants to look after the passengers．Young men，or"stewards"helped the passengers onto the airplane and carried the passengers'luggage but they did not provide food and drinks．But then in 1930，a woman called Ellen Church invented the"stewardess"．
