Merchant ships are designed to carry cargo. Some are also designed to carry passengers. They can operate as liners. These are employed on regular routes on a fixed timetable. A list of their arrival and departure dates is published in advance and they sail whether full or not. Liners can be classed as either deep-sea liners or short-sea liners. The former carry mainly containerized cargo across the oceans of the world; the later carry containerized or conventional cargo on shorter routes. Ferries are also classed as liners. These offer a daily or weekly service for passengers and vehicles across channels and narrow seas. A few ships are still employed as passenger liners. They not only carry passengers but also some cargo on routes from Europe to North America and to the Far East. Nowadays the passenger trade is very small and passenger liners usually operate as cruise ships for part of the year. 1.The deep-sea liners ________. A. carry mainly containerized cargo B. carry mainly conventional cargo C. offer a daily or weekly service for passengers and vehicles D. sail across channels and narrow seas. 2.The Liners ________. A. always sail full B. sail regularly even not full C. always sail in ballast D. will not sail if not full 3. A list of the arrival and departure dates of liners ________. A. will be published weekly B. will be published when they sail,whether full or not,from Europe to North America and to the Far East C. will not be published even they sail fully loaded D. is published prior to their departure 4.It is implied in the passage that ________. A. the number of passenger ships is small B. all passenger ships will carry some cargo in near future C. it is not necessary for liners to sail in regular time D. container carriers should carry some passengers