English Skills with Readings 8th Edition by John Langan

Exercise 26

Using coordination, subordination, or both, combine each of the following groups of simple sentences into two longer sentences. Omit repeated words. Various combinations are possible, so for each group, try to find the combination that flows most smoothly and clearly.
The boys waited for the bus.
The wind shook the fl imsy shelter.
They shivered with cold.
They were wearing thin jackets.