当没有孩子们的踪迹时，救援人员担心最坏的情况会发生。

When there was no sign of the children, the rescuers ___feared ___the ___worst.

她的父母已经持续争吵了将近半年，她担心最坏的情况会发生。

Her parents had been quarreling constantly for almost half a year, and she ___feared ___the ___worst.

飞机失联后，家人们担心最坏的情况会发生。

After the plane lost contact, the families ___feared ___the ___worst.