【单选题】Men have traveled ever since they flint appeared on earth. In primitive times they did not travel for pleasure but to【C1】______new places where their herds could feed, or to escape from【C2】______neigh...
【简答题】D irection: mark key words in red and devide the paragraph in meaning cluster. Scientists have proposed numerous theories to explain the sudden extinction of most the animal and plant life on Earth at...
【单选题】Woman: Where on earth are we? Man: Judging by all the traffic, I'd say we're near the heart of the downtown area. Question: What do we learn from the conversation?