第4题: [单项选择]You'd better not take his remarks too seriously, which apparently were______. A. simultaneous B. substantial C. spontaneous D. sporadic 参考答案:D 答案解析:单词spontaneous:自发的。单词simultaneous:同时的;同时发生的。单词substantial:实质上的;物质的;有内容的。单词sporadic:偶尔发生的;零星发生的;分散的。