Làm đúng chấm full điểm ----- Nội dung ảnh ----- Give the correct verb form 76. I went to John's house and (knock) on the door but there (be) no answer. Either he (go) out or he (not want) to see anyone. 77. We were good friends. We (know) each other for a long time. 78. Please hurry up, I (wait) for you for an hour. 79. I (teach) these students for 2 years. 80. I have no idea what the novel (be) all about. I never (read) it.