—I can’t find my purse anywhere.—You __ have lost it while shopping.
________ the front door________, he had to enter the room through the back door.
The government has considered________ many steps ________the environment free from pollution.
You’d better focus all your attention on the class. ________ you’ll miss the most important points.
Suffering from war, hunger and illness, many African children are ________ food, love and care.
There is a peaceful and calm ________ in the country, quite different from that of a big city.