第一句:Healthy care plans are needed in all big cities to prevent ______ spreadof AIDS. 空内填the。
我认为你的问题有两处拼写错误(见粗体部分):
第一句:Healthy care plans are needed in all big cities to prevent ______ spread of AIDS. 空内填the。
第二句:In ______ review of 44 studies, American researchers found that men and women who ate six key foods daily cut the risk of _______ heart disease by79%. 空内分别填 a 和 the,请详细地说一下,这三个空为什么这么填?