E. Complete the sentences using Present Perfect Continuous.
20.It … for two days. (rain)
21 .John … for two hours now! (sleep)
22.How long … you … the environment problems? (study)
23.She … to raise money for the zoo for months. (try)
24.He … hard to build a nesting box, that’s why it has already broken. (not / work)

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The London police were looking for a criminal who had robbed a bank. One day they caught him and took him to prison. But while they were taking photographs of him from the front, from the left, from the right, with a hat, without a hat — he suddenly attacked one of the policemen and ran away. 
Then a week later, the telephone rang in the police station and somebody
said, "You are looking for  Ben Jackson, aren't you?" - - "Yes." -
"Well, he was at Victoria Station an hour ago. He has probably left London by now."
The city police immediately sent four different photos of the robber to
the railway police. All the trains were searched.
Less than two hours later, they got a telephone call from a small town not
far from London. "We have caught three of the men," they said
happily, "and we hope to catch the fourth very soon."

ответ:

my dear friend!

i've never written letters to you, and most likely you'll be surprised to receive this letter. i hope that no distance will not be a hindrance to our communication.

i'm sorry that we had to part, but i'm happy for you. before you now open up new horizons. "a great ship is a great voyage! ". you must know that in order for life not to happen, you can always count on me.

of course, i'm sure that we will meet. you can always come to our city, and i'll be very glad if you stop at my place. i often recall our conversations. you know, i'm proud of our friendship and appreciate it. i am very glad that you have me and i want to thank you for your friendship.

write to me. i miss you.

your sincere friend .

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