Practice Underline the correct verb form in the sentences below. a. Thomas Cook organized / has organized the first tour in 1841. b. Pathfinders wasn’t / hasn’t been the first to offer tailor-made holidays. c. He worked / has worked in the travel industry since 1996. d. When did you start / have you started working for Kuoni? e. Customers became / have become demanding in the last few years. f. The number of bookings fell / has fallen since the accident. g. So far we had / have had a very successful season. h. Visitors from the USA increased / have increased by 8 percent since last year. i. We started / have started offering tours to Mexico two years ago. j. Many operators put / have put their prices up lately.