.Before the economic crisis came, John had sensed that the firm was to be ruined and he _____ just in time.
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.
---Where did you ________ our chemistry teacher?--- It was in the supermarket ________ I bought the moon cakes.