Some biologists believe this is an ancient survival strategy, _______ a diet with 30 percent fewer calories than usual increased life span.
It is surprising that such a young boy can swim ______ the river ______ 100 meters wide.
His English is improving _______, which makes both his parents and his teacher happy.
As he works in a remote area, he visits his parents only _______ .
Here are the first three books of his poem works, with the fourth one to _____ next month.
_______every member has arrived, let’s set about _____ the plan for the next five years.