更新1:
A 17-year-old boy has been arrested on suspicion (suspicion 怎解?) of selling them the drugs, but the case has raised fears 擔憂more teenagers 青少年are taking drugs at school and at home, because it‘s unlikely (unlikely 是adj. 或 adv?未必可能的/地?) they‘ll be caught.
更新2:
The above English was written from ATV Main News at 19:30. You may revise it if you like. Thanks