60.

How does exercise help the elderly?

• A、By improving attention.

• B、By slowing memory loss.

• C、By connecting with others.

• D、By controlling cell growth.

4.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.

• A、cool
• B、flood
• C、food
• D、moon