Bài tập ngữ pháp tiếng Anh cơ bản 4


    1. She for the exam for the past few hours. (study)

    2. They on the project since yesterday morning. (work)

    3. He the piano all afternoon. (practicing)

    4. I this book for a while, and it's really interesting. (read)

    5. We for the bus for over half an hour. (wait)