3.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、useless
• B、endless
• C、unless
• D、hopeless

59.

What should we do to better understand cats , according to the last paragraph?

• A、To treat them as friends.

• B、To compare them with dogs.

• C、To regard them as animals.

• D、To care about their behavior.