Упр.1 Поставьте глагол tо bе в правильную форму. 1. When she called, I (to be) at the bathroom. 2. They (not to be) able to come to us as they (to be) too busy at work. 3. The bags (to be) too heavy to carry. 4. It (to be) warm enough to stay outside without a coat. 5.(To be) the dinner tasty?