Every minute must be made full use of ____ our lessons, for the final examination is coming.
. Recently I bought an ancient Chinese vase, _______ was very reasonable.
You could see the runners very well from ______ we stood.
The factory was built in a secret place, around ______ high mountains.
Yesterday we visited a modern hospital, around _______ some fruit shops.
He had thousands of students, many of ______ gained great success in their own field.