答案：D　主旨大意题。根据文章内容可知冰封400年的植物也可以在合适的温度中再次复活。故选D项。

　　.七选五

　　根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两处为多余选项。

　　(2015·河北百校联盟3月模拟)

　　Many children like to eat snacks in everyday life, and some of them even have snacks during dinner. To maintain the normal meals and stay healthy, it is necessary to regularly eat snacks for children in their spare time. __1__

　　★Prepare healthy snacks in advance.

　　When you make something yourself，you get to control the ingredients(原料) and put in what's good for you! You can also keep plenty of fresh fruit and vegetables at home to take on the go.__2__Keep the servings in bags in the fridge, ready to grab and go.

　　★__3__

　　Make it a habit to store some fruit, whole­grain crackers, or baby carrots in your backpack so you always have some healthy food nearby. Half a cheese sandwich also makes a great snack to have on standby (备用)．

　　__4__

　　Healthy snacking doesn't have to be boring as long as you give yourself a variety of choices.

　　Whole­wheat biscuits with peanut butter or low­fat fruit yogurt are healthy, tasty, and easy.

　　★Satisfy cravings (渴望) with healthier approaches.

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