Решение задачи: Использование глаголов could, was, had

Вот заполненный текст с правильными формами глаголов: Mo **couldn't answer** question number five, it was too difficult. She couldn't remember anything about electrons or protons. She looked up and saw Terry sitting two rows in front of her. Mo couldn't believe it! Terry **was holding** her phone on her knee under the table and reading from it. Mo didn't know what to think. **Was it** that how Terry always gets such good grades? She felt really angry at Terry, but she didn't know what to do. She thought about telling the teacher, but what **would everyone else think** of her? It wasn't fair! Mo had never cheated and she often got in trouble for failing exams. Terry **had already put** her phone away when Mo looked up again. She looked back over her shoulder at Mo with a sad expression. "Stop **writing** and put your pens down" said Mr Reed as he started to collect the exam papers. Oh no, Mo hadn't answered two of the questions. She was going to fail again!