— ____ 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
答案是D
A主要是谓语不对.如果把is换成are亦对了,还有第一个应改成of being visited才行
Those who have visited the shanghai world expo are sure to tell you the place is worthy ____ twice．
C 就是把is改成are就对了.
B也是应该改第二个空为of being visited被动式