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　　The books in David’s schoolbag felt like bricks as he ran down the street．What he wanted to do was to play basketball with Eric, 　　1　　 his mother told him he would have to return his sister’s books to the library first．

　　He had 　　2　　 se foot in a library and he wasn’t about to do so today．He would just 　　3　　 the books in the outside return box．But there was a 　　4　　; it was locked．

　　He went into the building, only a few minutes 　　5　　 closing time．He put the books into the return box．And after a brief 　　6　　 in the toliet, he would be on his way to the playground to 　　7　　 Eric．

　　David stepped out of the toliet and stopped in 　　8　　－the library lights were off．The place was 　　9　　．The doors had been shut．They 　　10　　 be opened from the inside, he was trapped(被困)－in a library!

　　He tried to 　　11　　 a telephone call, but was unable to 　　12　　．What’s more, the pay phones were on the outside of the building．　　13　　 the sun began to set, he searched for a light and found it．

　　　　14　　 he could see．David wrote on a piece of paper：“　　15　　!I’m TRAPPED inside!” and stuck it to the glass door．　　16　　, someone passing by would see it．

　　He was surprised to discover that this place was not so unpleasant, 　　17　　．Rows and rows of shelves held books, videos and music．He saw a book about Michael Jordan and took it off the shelf．He settled into a chair and started to 　　18　　．

　　He knew he had to 　　19　　, but now, that didn’t seem to be such a 　　20　　 thing．

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