【正文】
pened met seen 5. have arrived finished Ⅱ.→kept →has →long 4. for→since →got Ⅲ. ; been; back; to ; been; dirty ; been; dead ; been;on ; been; in; the; club Ⅳ. 2. D 3. D 4. A 5. C 6. C 7. D 8. D 9. D 10. B 能力提升 Ⅰ. Ⅱ.In the distant past , the\ people did not cook did not know whathow to do it at they killed animalanimals, they often did not even take the skin ofoff them before they ate of us believe that ∧it was forest fires that first introduced the\ man to the art of fires were sometimes started by storms, and people ran away from the burntburning areas and returned when the fire had been\ gone animals happenhappened to be cooked and were found more tastetasty. 。 Period Three Grammar 基礎(chǔ)落實(shí) Ⅰ. 用所給詞的適當(dāng)形式填空 1. The price ________________ (go) down, but I doubt whether it will remain so. 2. — I haven’t heard from Henry for a long time. — What do you suppose ________________ (happen) to him? 3. You don’t need to describe ________________ (meet) her several times. 4. So far this year we ________________ (see) a fall in house prices by between 5 and 10 percent. 5. It