题目

完形填空：     Fire can help people in many ways. But it can also be very harmful （有害的）. Fire can keep your house   1  , give light and cook food. But fire can burn things   2   . Big fire can burn, trees, houses, animals or people.     Nobody knows how people began to use fire. But there are   3   interesting old stories about how a man or woman started a fire. One is   4   a man. The man   5   a very long time ago. He went up the sun and   6   fire down.     Today people know how to make a fire with matches （火柴）. Children som某豪华邮轮2017年3月22日从上海起航，经过83天的环球航行，于6月13日回到上海。下面是乘坐这班邮轮的王先生在途中的所经所见所闻，读下图，完成下列各题。(1)王先生在航行中经过了两条世界重要的运河，其中A是______________，B是______________。(2)到达雅典后，王先生了解到英法等地的居民夏季常到阳光明媚的地中海沿岸休假，试从两地的气候特点分析其原因___________________。(3)到达美国纽约后，王先生了解到美国是发达国家中人口增长较快的国家。你认为美国人口增长较快的原因是______________________。(4)王先生历时近三个月的航行回到上海，发现上海的白昼时间比他离开时____(填“长”或“短”)。