Mary went to Canada on vacation. After a week, she came back to New York. She told lots of interesting things to her best friend, Jack. Jack was very interested in Canada and decided to have a visit there. The next summer vacation, Mary and Jack had a plan to go to Canada together. But her mother was badly ill so she went to the airport to see her friend off. When they got to the airport, Mary had to got to the washroom. When she came back, she couldn't find Jack because there were so many people at the airport. She looked for him everywhere, but it was hard to find Jack among the people. Suddenly Mary saw Jack and she felt very happy, so she shouted,"Hi, Jack. Here, here." At the same time, Jack waved his arms,"I'm here." In 3 minutes, so many policemen came to the front of Jack and caught him, "Please come with me to the police office." After the policemen found out the reason, they let them free. Why? Because the word "hijack" in the English has different meanings.
Who was detained by the police?
Who was he meeting at the airport?
Where was he travelling?
From where?
Who visited Canada first?
Was she going this time, as well?
Why not?
Why did she have difficulty locating Jack at the airport?
Was she relived to finally find him?
What did she yell?
What did the police think she said?
Was he taken to jail?
Where did they question him?
Jack
many policemen came to the front of Jack and caught him
Mary
Suddenly Mary saw Jack 
Canada
ack was very interested in Canada and decided to have a visit there.
New York
she came back to New York
Mary
Mary went to Canada on vacation
no
But her mother was badly ill so she went to the airport to see her friend off.
her mother ill
her mother was badly ill 
so many people
because there were so many people at the airport.
yes
Suddenly Mary saw Jack and she felt very happy
Hi, Jack. Here, here
Hi, Jack. Here, here
hijack
hijack
yes
Please come with me to the police office
the police office.
Please come with me to the police office.