— visited the Shanghai World Expo is sure to tell you the place is worthy twice．
— You can say that again．
A. Those who have; visiting
B. Whoever has; visiting
C. Those who have; to be visited
D. Whoever has; to be visited
网友回答
A. Those who have; visiting
B. Whoever has; visiting
C. Those who have; to be visited
(答案→)D. Whoever has; to be visited
解析：第一空应该是BD是对的，因为后面谓语是is sure to，whoever=anyone who后面的谓语是单数，those做主语，谓语是复数，第二空填to be visited，词组是be worthy to be done
“值得被做”，句意是：--凡是去过上海世博会的人肯定会说这个地方是值得参观的。