QUESTION $17$

$(1)$ Contrary to what many people think, a positive test for HIV is not necessarily an immediate death sentence. For one thing $(2)$ the time from the development of antibodies to clinical symptoms averages nearly ten years. For another $(3)$ many reports are now suggesting that a significant number of people who test positive may never develop clinical AIDS.

a$.(1)$

$(2)$

$(3)$

b$.(2)$

$(1)$

c$.(2)(3)$

$k$

$(1)$

d$.(1)(2)$

$(3)$