大学英语(1)习题2Part I. Use of English Directions: In this part, there are 10 incomplete dialogues. For each dialogue, there are four choices marked A, B, C and D. Choose the ONE answer that best completes the dialogue. 1. Guess what? I passed the English exam!_C_ A. Thats fine B. Its OK. C. Congratulations! D. Believe it or not. 2. I must go now. The plane will leave in half an hour. Thank you for seeing me off._B_ A. Good luck. B. Be care