1476169 Tom underwent surgery. Spamster 1 295015 He underwent a risky operation. CM 1 269060 The new engine must undergo all the necessary tests. CM 1 309751 Her mother is going to undergo a major operation next week. CK 1 256886 I underwent major surgery last year. CK 59946 This town has undergone a rapid change. CM 319267 Father is going to undergo an operation. CM 1503581 The drug addict had to undergo rehabilitation. Dejo 325101 He will have to undergo an operation next week. CM 21985 The surgeon persuaded me to undergo an operation. Swift 21984 The surgeon persuaded him to undergo an organ transplant. Swift 2266319 He had to undergo an operation immediately after his fall. _undertoad 21982 The surgeon persuaded me to undergo an organ transplant operation. CK 281529 Japan has undergone a drastic change as a result of industrialization. CK 3340487 Tom will have to undergo several months of rehabilitation after leaving hospital. patgfisher