Замените определительные придаточные предложения оборотом с причастием I.  1. When I travel I always reserve accommodation in advance.2. We are going to contact the firm which is advertising the latest modal of the boilers.      3. When the director came into the office he saw several people who were waiting for him.4. When we write a cable we try to use as few words as possible.

1. Travelling I always reserve accommodation in advance.2. We are going to contact the firm advertising the latest modal of the boilers.3. Coming into the office the director saw several people waiting for him.4. Writing a cable we try to use as few words as possible.

1. When travelling I always reserve accommodation in advance. 2. We are going to contact the firm advertising the latest modal of the boilers. 3. Having come  into the office the director saw several people waiting for him. 4. When writing a cable we try to use as few words as possible.