Questions l8 t0 20 are based on the following passage.
I’m Mr.Parker，the head librarian，and today I'd like to introduce you to the facilities in OHr unlVerslty library and show you how to use them.[18]The first room on our tour is the reference room, where you'll find all sorts of reference materials：dictionaries,bibliographies,literature guides,even telephone books.You may use these books only in the reference room itself. [19]The next room is the periodicals room,where You’ll find various newspapers，magazines and academic joumals.The current issues are usually dkecfly available to You on the shelves.And you can get an older issue by filling out a slip for the librarian.These items must also be used in this room.This next room contains the card catalogs.All the library’s books are listed here by title，bY author and by topic.[20]When you are looking for a book you must write the book's call number, title and author on these slips and present them with your library card at the desk.The books themselves are kept in the stacks，which are open only to graduate students， faculty members and library staff. Our library has over a million volumes in these stacks which cover five floors. If you have any further questions about uslng the library.I’d be glad to help you after the tour.Thank you for your attennon.
Keys：18.【D】19.【C】20.【A】
SECTION C NEWS BRoADCAST
Questions 21 t0 23 are based on the following news.
[21]Five suspected Somali pirates were taken into custody Thursday after firing at a U·S·Navy battleship deep in the Indian Ocean，hundreds of miles off the East African coast.
In what appeared to be an ill—conceived attack for ransom，pirates shot small arms rounds at the gulded missile frigate USS Nicholas.The Nicholas returned fire，[22]sinking the small pirate skiff and taking its two passengers into custody.The Nicholas crew also captured two suspected pirates onboard the pirates’ nearby mothership.A third pirate skiff fled the scene.
Pirates usuallv operate from small motor boats they launch from“motherships”--typically much larger boats thev，ve either stolen or highjacked.[23]Motherships carry supplies and fuel, giving pirates the ability to operate much farther from the well patrolled coastline.
Keys：21.【B】22.【D】23.【C】