It will be many years ______the doctors and medical scientists can find _____ for cancer.
209. The world is________seven continents and four oceans. They are: Asia, Europe, North America, South America, Africa, Oceania and the Antarctica; the Pacific Ocean, the Atlantic Ocean, the Indian Ocean and the Arctic.
208. Last week, I was ill for some days and I’m determined to___________the lost time.
207. The captain_____________an apology to the passengers for the delay caused by bad weather.
206. The loud noises from that factory almost _____ me mad.
205. The battle hero we _______an ordinary soldier at first gave us an inspiring(令人鼓舞的) talk.