Sample item
Put the text boxes in the correct order.
A) This meant the settlement could support a far larger population than its neighbours. B) Archaeologists excavating the site found evidence of an early irrigation system. C) It drew water from the river through a series of stone-lined channels. D) The channels were maintained collectively, implying a level of social organisation not previously assumed for the period.
B, C, D, A
B is the topic sentence — full noun phrases, no back-reference. 'It' in C refers to the irrigation system. 'The channels' in D takes the definite article introduced in C. 'This' in A refers to the whole preceding situation.