In this section, you will hear a passage twice. You are required to choose one of the four choices marked A), B), C) and D) which stands for the exact word you have heard Researchers at the National [S1] _________ of Health began the study in January of 2002. They called it SMART—Strategies for Management of Anti-Retroviral [S2] _________. They wanted to study six thousand people around the world. The [S3] _________reached more than [S4] _________ percent of the target before they halted new [S5] _________ last month. They did so earlier than planned. The researchers tested all the people for the level of CD-four [S6] _________ in their blood. These cells are a measure of the strength of the body’s [S7] _________ system. The researchers divided the [S8] _________ into two groups, one group stayed on continous anti-retroiviral therapy. They took their medicines every day. The others took them periodically. They took the[S9] _________ only when their CD-four count fell below two hundred fifty cells per cubic millimeter of blood. The patients would go off the drugs again once their cell count climbed above three hundred [S10] _________. The study found that these patients were two times as likely to develop AIDS or to die as the group on continuous treatment. [S1] A. Installs B. insistence C. Institute D. Institutes [S2] A.Strategy B. Therapy C. Treatment D. Tragedy [S3] A.science B. scentific C. scientists D. cents [S4] A. ninety B. nineteen C. nine D. fifty [S5] A. enhancement B. rode C. enrollments D. enquirement [S6] A. sales B. tells C.sails D. cells [S7] A. defend B. fence C. dance D. defense [S8] A. patients B. pace C. pain D.pay [S9] A. truck B.trunk C. drugs D. rugs [S10] A. ninety B. nineteen C. nine D. fifty