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课程与PC端同步更新，充分利用零碎时间。做题
海量精选试题，想练就练，瞬间提分。答疑
海量精选试题，想练就练，瞬间提分。直播
名师大咖面对面，有问有大收获多。About 70,000,000 Americans are trying to lose weight(减肥). That is almost 1 out of every 3 people in the United States. Some people eat 1 food and they hardly have any fats or sweets. Others do running, exercise with machines, take medicines, or even have operations. 2 you can see losing weight is 3 work, and it will also cost a lot of money. But __4 do so many people in the United States want to lose weight?
Many people in the United States worry about their look of the body. For many people, looking nice also means to be 5 . Other people worry about their health as many doctors 6 overweight is not good.
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