English reader at level B2.1. Part of a series of readers ranging from level A1 to C2. In this story, A team of young marine researchers on a routine mission begins hearing strange messages through their sonar system. As communication fails and a storm isolates them underwater, the signals get clearer-and more human. But no one outside the station believes them.
English reader at level B2.1. Part of a series of readers ranging from level A1 to C2. In this story, A team of young marine researchers on a routine mission begins hearing strange messages through their sonar system. As communication fails and a storm isolates them underwater, the signals get clearer-and more human. But no one outside the station believes them.