I’m c------- that the expo in Shanghai in 2010 will be a great success(c是问题单词的开头字母,请写出,这个以c开头的单词

问题描述:

I’m c------- that the expo in Shanghai in 2010 will be a great success
(c是问题单词的开头字母,请写出,这个以c开头的单词

certain

certain
句子意思 我确信2010上海世博将会成功.