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
34.
A、might not
B、might
C、must not
D、must
There are numerous websites on the Internet ____ you can learn how to cook.