单选题 Ever since Picasso's painting went on exhibit, there ______ large crowds at the museum every day.
【正确答案】 C
【答案解析】本题测试时态及主谓一致。“ever since+时间”作状语，句子谓语动词一般用现在完成时；而crowds又要求动词为复数。本句大意为：自毕加索的画展开始以来，博物馆每天有大量的人来参观。