第21题: [单项选择]Like some foreigners, I ask a lot of questions, some of which are insultingly silly. But everyone I ______ has answered those questions with patience and honesty. A. come across B. come by C. come over D. come into 参考答案:A 答案解析:come across遇到;come by得到,获得;come over前来,(感情、疾病等)产生、袭来;come into进入(某种状态),继承(财产等)。该句中insultingly silly意