According to Aristotle,we are ________ we repeatedly do.Excellence then,is not an act,but a habit.
I, who ____ your teacher, will try my best to help you with your English.
All that can be done _______.
The man couldn’t _____the fact that the lost watch was found in his house.
Towards _______evening, ________ cold rain began to fall down.
Whether life will continue on the earth for millions of years ______will depend on ____this problem can be solved.