【单选题】ection B Multiple ChoiceThere are 10 incomplete sentences in this section. For each sentence there are four choices marked A), B), C) and D). Choose the ONE answer that best completes the sentence. Al...
【简答题】S ection 4 49 曲目 49.mp3: Questions: 31-34 Complete the summary of the introduction to a lecture on bird migration below. Write no more than three words and/ or a number for each answer. Birds migrate ...