Section D Listen to a short passage:I'm Wang Hong, a tour guide at Discovering China. I've been working as a tour guide for more than 10 years. My father was _______(20), too. I learned a lot from him. I _______(21) being a tour guide. I've ________(22) to many places in China and abroad in the past 10 years. Every day is a challenge for me, working with different people, but it is ________(23) and rewarding. I love working with people from different places. China has rich tourism resources and I am still _______(24) to explore its wonderfu natural scenery.