42. happened

　　【解析】 根據下文in...可知此處應該填入一個動詞，表示"發生"。

　　43. victim

　　【解析】 此處應該填入一個名詞被first修飾。

　　44. The problem was that they had no protective equipment to prevent themselves from being infected

　　【聽音關鍵詞】protective equipment，prevent，infected

　　45. Now the disease appears to be under control, but no one can promise that for 100 percent

　　【聽音關鍵詞】disease，under control，promise

　　46. Scientists are now headed into the jungles of Africa to find out where the virus lives

　　【聽音關鍵詞】headed into，jungles，virus