Revision: translate the following sentences
1.美国警方现已加紧对一名15岁男孩的搜索。 2.自从上周五晚我就没有看到贾斯丁。 3.这次事件引起了公众的极大兴趣。
Police in America have stepped up their search for a fifteen-year-old boy.
I have not seen Justin since last Friday night.
This incident has received great interest of the public.