课时训练(四) ⅰ.阅读理解 a tapping(窃听)phones is probably one of the most common techniques in spy(谍战)movies.but when it takes place in real life with the world's top leaders as victims(受害者)，it is a story much more thrilling than any film. the drama started when documents(文件)were leaked(泄露)by edward snowden，the former cia employee(雇员)and national security agency(nsa) contractor(
