In the past several weeks, many cities in Northern China________from heavy fogs, causing great inconvenience to people.
_____, the great mother, in order to save her sick child, kept waiting for four hours in the heavy snow.
To their surprise, they found the lecture given by the famous professor easy ______.
If you are not familiar ____ the topic, you may write something that is familiar ____ you.
We would rather die than ______ difficulty.
Go about your business your own way. Don’t _____what others think or say.