II. Choose the best answer among A, B, C, or D. 1. We _______ Dorothy since last Saturday. A. don’t see B. haven’t seen C. didn’t see D. hadn’t seen 3. The train ______ half an hour ago. A. has been leaving B. left C. has left D. had left 4. Jack ______ the door. A. has just painted B. paint C. will have painted D. painting 5. My sister ________ for you since yesterday. A. is looking B. was looking C. has been looking D. looked 6. I ______ Texas State University now. A. am attending B. attend C. was attending D. attended 7. Christopher Columbus _______ American more than 500 years ago. A. discovered B. has discovered C. had discovered D. had been discovering 8. We _______ there when our father died. A. still lived B. lived still C. was still lived D. was still living 9. They ______ table tennis when their father comes back home. A. will play B. will be playing C. play D. would play 10. I _______ in the room right now. A. am being B. was being C. have been being D. am Giúp mình với !