Which of the following is closest in meaning to “sitting on the sidelines” in Para. 3?
A、Not being notice
B、Expressing vague ideas.
C、Not being involve
D、Following what others do.
What is the main idea of the passage?
A、Exercise strengthens people's body
B、Exercise helps babies to grow.
C、Exercise improves people' s lif
D、Exercise benefits the brain.
2. In each of the following groups of words, there are four underlined letters or letter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation.