完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。
Since my family were not going to be helpful, I decided I would look for one job by myself and not tell them about it till I'd got one.
I had seen an agency advertised in a local newspaper. I rushed out of the 21_ in search of it. I was wildly excited, and as 22_ as if I were going on the stage. Finding the 23_ quite easily, I ran breathlessly through a door which said " Enter without knocking, if you please. "
The simple atmosphere of the office 24_ me. The woman looked carefully at me 25_ through her glasses, and then 26_ me in a low voice. I answered softly. All of a sudden I started to feel rather 27_ . She wondered why I was looking for this sort of 28_ . I felt even more helpless when she told me that it would be 29 to get a job without 30_ . I wondered whether I ought to leave, 31_ the telephone on her desk rang. I heard her say:
“ 32_ , I've got someone in the 33_ at this very moment who might 34_ . " She wrote down a 35_ . and held it out to me, saying: "Ring up this lady. She wants a 36 immediately. In fact, you would have to start tomorrow by cooking a dinner for ten people."
"Oh yes, " said I—— 37_ having cooked for more than four in my life. I 38_ her again and again, and rushed out to the 39_ telephone box. I collected my thoughts, took a deep breath, and rang the number. I said confidently that I was just what she was looking for.
I spent the next few hours 40_ cook books.
21． A．bed B．house C．agency D．office
22． A．proud B．please C．nervous D．worried
23． A．family B．door C．place D．stage
24． A．calmed B．excited C．frightened D．disturbed
25． A．as usual B．for a while C．in a minute D．once again
26． A．advised B．examined C．informed D．questioned
27． A．encouraged B．dissatisfied C．hopeless D．pleased
28． A．place B．job C．advice D．help
29． A．difficult B．helpless C．possible D．unusual
30． A．ability B．experience C．knowledge D．study
31． A. after B．since C．until D．when
32． A． Above all B．As a matter of fact C．As a result D．In spite of that
33． A． family B．house C．office D．restaurant
34． A． hire B． accept C．suit D．offer
35． A． letter B．name C．note D．number
36． A． cook B．help C．teacher D．secretary
37． A． almost B．never C．nearly D．really
38． A． answered B．promised C．thanked D．told
39． A. outside B． local C．closest D．nearest
40． A． burrowing B．buying C．reading D．lending
m。已知粒子
能以沿着y轴负方向的速度垂直穿过x轴负半轴上的N点，不计粒子重力。求：