... parts- "Heterogeneity", "language" and "classroom".Similarly, the second heading can be divided into 3 parts - "Major influence", "existing" and"student ... enormousproblems for fishermen, especiallyin Britain.(The comma after 'fishermen'ensures that 'especially' connectswith 'Britain' not 'fishermen'.)e.g. Therefore, ... information to check for in the reading passage - "Studentsof the same nationality", "usually make", and "similar study choices".Each of these 3 areas of information...