In Australia, surfing is a popular sport among young people _____ they can seek excitement and adventure.
A．that
B．which
C．whom
D．where
答案：D
题目分析：句意：在澳大利亚，冲浪是年轻人中很受欢迎的运动，其中他们能够追求刺激和冒险。这句话用了定语从句，先行词是surfing，定语从句中不缺少主宾表，缺少的是地点状语，用where引导定语从句。选D。
Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context. Behind our house is the start of a fascinating trail (小径). This trail is one of the old roads that wind through untold miles of forest. My 36 , Beans, and I walk the trail frequently. Normally, Beans sniffs alongside the trail to follow the smell of a deer track or 37 some cause known only to him. Beans is a white dog, quite handsome and very 38 . He not only understands what we tell him, but also often makes sounds as if he were trying to 39 back. One morning, we took a different route, which led us to an unfamiliar trail. I was sure this trail would eventually lead us to our familiar 40 . But, no. We seemed to be far off course. After two hours, I suddenly realized that Beans probably 41 the way home. So I urged, "Beans, take me home." He ran down a new trail. But it merely led to an intersection (岔道口) of trails. Soon it became 42 that we were getting nowhere. I began to picture the rest of the day in the 43 without food or drink. We had walked about ten miles. But Beans seemed totally 44 . The sniffing and exploring was going well for him. Finally, we 45 a crossroad near a highway. Lady Luck suggested I should turn left. We did and 46 reached a cottage beside a field. I knocked on the door and explained my situation to an old man. He laughed and then drove us home. Since our adventure, I 47 that Beans probably knew all along how to get home. He was just having too much fan exploring new trails.
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，求滑板被碰后的速度大小。