15．D。the number of表示“……的数目”，而a number of表示“许多……”。

100

　　　 Mr. Robinson had to travel somewhere on business, and as he was in a hurry, he decided to go by __1__ . He liked sitting __2__ a window when he was flying, so he got onto the plane, he looked for a window seat. He __3__ all of them taken except one. There was a young man __4__ beside it, and Robinson was surprised that he had not taken the one by the window. Anyhow, he went towards it.

　　　 When he __5__ it, however, he saw that there was a notice on it, written __6__ large letters, __7__ “This seat is kept for proper balance. Thank you.” Mr. Robinson had never seen such a notice before, but he thought the plane must be carrying something particularly heavy in its room __8__ made it necessary to have the passengers properly balance. So he walked on and found __9__ empty seat, not beside the window __10__ .

　　　 Two or three other people __11__ to sit in the window seat next to the young man, but they also read the notice and went on. Then when the plane was nearly 　12__ a very beautiful girl __13__ into the plane. The young man, who was watching the passengers coming in, 　14__ took the notice __15__ the seat beside him, and by this means succeeded in having a pretty companion during the whole trip.

14．A。change one’s mind意为“改变主意”。

13．C。have sb. do sth.意为“让某人做某事”。其余三词后面的动词不定式都要加to。

12．D。从下文中可以看出小女孩其实很聪明，但是富翁却以为她“愚蠢”。

11．A。只有few可以修饰dollars。

10．B。in this way为固定短语。

9．B。此处指“富翁”。

8．C。should表示“应该”。

7．C。由the man 的心理及前面的only a child推知，此时想“欺骗”

那个女孩。

6．D。从下文可知，此处表示原因。