根据中文提示, 完成下列句子, 每条横线上填写一个词。
小题1:美国警方现已加紧对一名15岁的男孩搜索，该男孩三天前在多佛市失踪。
Police in America have _______ ______ their search for a fifteen-year-old boy who went missing three days ago in Dover.
小题2:人们也发现过一些巨大脚印，有人称他们属于野人。
Large tracks have also been discovered which some people say ______ _____ the Wild Man.
小题3:作为保护措施，你得戴上头盔，穿上救生衣，以防万一掉进水里。
You have to wear a helmet and a life jacket _____ ______ , just in case you fall into the water .
小题4:山脚下，阳光照在星罗棋布的湖面上，使它们在富丽乡村景色的映衬下，如钻石般闪耀璀璨。
Below the mountains, the sunshine reflects on the many lakes, _______ them shine like diamonds ________ the rich countryside .
小题5:一旦被人吸入，它们就可能导致疾病甚至死亡。
If breathed in , they can _______ _______ illness or even death.