In our lives， our parents give us love and warmth． In return， we should understand and care about ______．（　　）

When you're tired， you can get close to the nature ______ you'll feel relaxed in the beauty all around．（　　）

If a student is able to ______ somebody else what he's learnt from textbooks， it shows he's understood it well．（　　）

Whoever he is， a common man can be called a ______ hero when he is admired by us for doing something brave or good．（　　）

Reading the first ______ of each paragraph before you read the whole text helps you get the main idea quickly．（　　）