5.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、easy
B、noisy
C、busy
D、fantasy
The old man's clothes, ____ old and worn, looked clean and of good quality.
A、if
B、when
C、though
D、since
Which of the following is closest in meaning to “sitting on the sidelines” in Para. 3?