The Appalachian Trail, ______approximately 2020 miles from Maine to Georgia, is the longes

A big storm ______ the town at 2 p.m., leaving a trail of damaged houses, injured peop

Lions can be photographed easily when ______.A．they are following a trail of something tha

The word "prolonged" in line 13 is closest in meaning to ______.A．preciseB．extendedC．appro

According to the news item, the trail of Robot wardens is sponsored by______.A．the governm

The firefighters are going to ______________ the cause of the fire.

The ratio of the work done by the machine______________the work done on it is called the