【正文】
s almost 100 years old. student was given some advice by the famous scientist. The student was not worried about his scientific experiment any more. Given some advice by the famous scientist, the student was not worried about his scientific experiment any more. 1. Unless ___ to speak, you should remain silent at the conference. A. invited B. inviting C. being invited D. having invited A 2. ___ many times, the problems were settled at last. A. Discussing B. Being discussed D. After discussing D. Discussed D 3. ___ in the fog, we were forced to spend two hours in the woods. A To lose B. Losing C. Lost D. Having lost C 4. ___ in white, she looks much more beautiful. A. Wearing B. Dressing C. Dressed D. Having dressed C 5. ___, the old man is living a happy life. A. Taking good care B. Taken good care C. Having taken good care D. Taken good care of D 6. The old man walked in the street, ___. A. followed by his son