题目内容：

One Sunday afternoon，my younger brother and I were left alone at home．I was doing my homework    my younger brother was watching TV．Suddenly，the doorbell rang．My brother thought it was our parents, so he opened the       quickly．

A tall man stood outside and asked politely         our parents were at home．

     thinking，my brother answered，“No．” When I wanted to close the door，he suddenly        the door very hard and came into our house．He took out a           and ordered me to tie up my brother’s        with a rope (绳索)．I tied up his hands in a special way so my brother could untie（松开）himself        ．The man then tied my hands up and locked       of us in the kitchen．

Soon, he went upstairs．I taught my brother to untie his rope with his hands．He then untied        ．We rushed to the telephone to call the police, but the line was cut off．The doors were all locked from outside．It was lucky that the man forgot          the kitchen door．We got out of the house        the window and went to the          pay phone to call the police．

Soon the police came and the man was caught．By the time, my parents had come home．We told them the whole story．My parents were glad that we were not         ．They told me that I should stop my brother from       the door to the stranger．I learned a lesson on safety．

1.A．as    B．before   C．while    D．when

2.A．cupboard  B．door     C．doorbell   D．window

3.A．if    B．how    C．when    D．why

4.A．After   B．By    C．Before   D．without

5.A．pushed   B．took    C．knocked   D．closed

6.A．candy      B．gift     C．knife    D．phone

7.A．feet    B．legs     C．hands    D．arms

8.A．difficultly  B．easily    C．hardly   D．suddenly

9.A．all       B．both     C．each    D．neither

10.A．me        B．myself    C．him     D．himself

11.A．locking    B．closing    C．closed    D．to lock

12.A．across   B．under    C．over    D．through

13.A．farther   B．nearest   C．cheapest   D．nicest

14.A．crying   B．hurt    C．frightened   D．lost

15.A．turning on  B．sending   C．opening       D．closing