2016年9月5日，二十国集团领导人杭州峰会在杭州国际博览中心继续举行，这次峰会吸引了大批游客在“十一”假期间前往杭州旅游．为抓住商机，两个商家对同样一件售价为50元/个的产品进行促销活动．甲商家用如下方法促销：若购买该商品不超过10个，按原价付款：若一次购买10个以上．且购买的个数每增加一个，其价格减少l元，但该商品的售价不得低于35元/个；乙店一律按原价的80%销售．现购买该商品x个，如果全部在甲商家购买，则所需金额为y₁元：如果全部在乙商家购买，则所需金额为y₂元．

语法填空

    Peeling（削皮）vegetables can be the____boring part of any meal as you spend extra  minutes____prep time. And when you're doing,you____(leave) with a pile of unusable skins ____usually end up in the garbage can.

    But according to health experts,what we throw away is actually one of the healthiest____(part) of our foods.

    Daily Mail Online spoke to Mary Jane Detroyer,a registered dietitian and nutritionist based in New York,about ____we shouldn't be peeling our vegetables and all the hidden benefits____(find) in the skins.

    According to Detroyer,there are several reasons to be leaving the skins on,and the main reason is what you deprive（使丧失）your body of when you peel____off.The skins of produce like potatoes,carrots,and cucumbers all have plenty of health benefits."The skins have a lot of fiber and it's insoluble（不溶性）fiber,especially____the skins are colorful,"Detroyer told Daily Mail Online.“Most of the time,____majority of the vegetable's nutrients are in the skins.”

较大剂量注射一种激素后，小白鼠渐渐反应迟钝，活动减少，以致昏睡，该激素是（　　）

最先证明地球是球形的事件是（  ）

品读李白的《塞下曲六首》（其一），按要求回答问题。
五月天山雪，无花只有寒。笛中闻折柳，春色未曾看。
晓战随金鼓，宵眠抱玉鞍。愿将腰下剑，直为斩楼兰。