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       Both the British and Americans speak English. However, there are several differences between American English and British English. For example, the words they use in daily life are not the same. The British call the first floor of a building the ground floor. The floor above the ground floor is the first floor, which Americans call the second floor. Once you go to Britain and America, you may notice other differences. The British usually hide their feelings. They don't often start a talk with strangers. On the train the British often spend their time reading newspapers or books. But Americans are more active and easier to talk with.

约翰·施特劳斯被誉为“圆舞曲之王”。下列属于他的作品的一项是（  ）

王叔叔酒后驾驶，出了车祸，经过诊断为右上肢瘫痪，可能是由于（　　）

体育课上每组有3人玩球，5人跳绳，每组有____人。