Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.
(A) like malaria and dengue have focused either on the vaccination of humans or on exterminating
(B) like malaria and dengue have focused either on vaccinating of humans or on the extermination of
(C) as malaria and dengue have focused on either vaccinating humans or on exterminating
(D) as malaria and dengue have focused on either vaccinating of humans or on extermination of
(E) as malaria and dengue have focused on either vaccinating humans or exterminating
题目分析：划线外有个such，那就提示划线里面应该有as，不能以like开头，后面应该把vaccinate和exterminate这两个内容写成并列的，C either后面用vaccinating后面用on exterminating，不并列，D前面用vaccinating后面用extermination显然不合适。E前面用vaccinating后面用exterminating，并列，选这个！
