He hadn't heard from his parents for a long time.So he was worried that something bad had happened to them.
something bad had happened to sb.糟糕的事情(已经)发生在某人身上.
He hadn't heard from his parents for a long time.So he was worried that something bad had happened to them.
something bad had happened to sb.糟糕的事情(已经)发生在某人身上.