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