Afterworkingfortwentyhourswithoutanyrest,thedoctorswere_______.
A、exhaustedSomestatesintheUnitedStates_______peopletocarryguns.
Pine trees are usually believed to _______ cold weather.
Weare_______attherapidprogressMarkhasmadeinthissemester.
We do not have a _______ school in our institute. The highest degree we provide for the students is a B. A. and a B.S. .
This river forms a natural _______ between China and Korea.
