Why do dogs wear a guilty look according to the researchers?
A、To attract their owners
B、To deceive ther owners.
C、To beg their owners for treats.
D、To show obediene to their owers.
24.( )
A、firm
B、positive
C、definite
D、absolute
4.Directions:In each of the following groups of words, there are four underlined letters or lettercombinations marked A, B, C and D. Compare the underlined parts and identify theone that is different from the others in pronunciation. Mark your answer by blackeningthe corresponding letter on the Answer Sheet.()