五、选用方框内合适的单词或短语并用其正确形式补全下面短文(有两个多余选项)。 power, present, promote, quit, run out of, run over, set in, show up Chocolate nearly always 1. in the rations ( 口粮 ) of polar explorers and the military as well as other adventurers. Here’s why . It is small and light weight, but high in calories ( 卡路里 ), which means it can be carried easily. No food to fill you up? Chocolate requires no preparation time, so it can be eaten on the move . Rich in fat and carbohydrates, as well as a lot of vitamins, it can give you that extra 2. you need to keep you going when you’re 3. energy . Chocolate’s magic ingredient ( 成分 ) is cocoa. Cocoa has been used throughout history as a folk medicine and studies have shown that it indeed does 4. good health. Dark chocolate contains more cocoa and less additives and sugar, so it is the healthiest choice. Finally, chocolate has a much longer shelf life than many other foods as it has no expiry date and only a best before date, after which it can still be eaten safely. It is also a comfort food. Most rations are boring, which can slowly build up stress over time. When depression ( 沮 丧 ) 5. and you feel like 6. , the different tastes of chocolate and its high calorie content is great for reducing that stress and making you feel good.