阅读理解
阅读下列短文，从每题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。
A
He was just 12 years old when he died. But he brought courage and hope to people around the world.
Nkosi Johnson, who died last June, is remembered today as an AIDS fighter. This young boy challenged his government’s AIDS policies and millions of South Africans in the fight against the disease.
Johnson was the longest survivor born HIV positive（艾滋病病毒携带者）.He survived with this deadly disease for 12 years before it claimed his life.
At first, Johnson was expected to live for nine months when his foster m
