A Practical English Grammar: Exercises 2 (Bk. 2)
A. J. Thomson was born in Ireland and educated in Trinity College at Dublin University. She has taught English in a Polish school, in Spain and in an ILEA College for adults in London.  Agnes V. Martinet was born and educated in Edinburgh and gained an MA in Languages from Edinburgh University. She has taught English to adults from various nationalities in the UK, and taught English in Spain for two years.