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
After whom was the Amazon River named?
A、The Indian women fighters.
B、The head of an Indian trib
C、The first explorer of the river.
D、The women fighters in ancient Creek stories.
What does most research about cats show?
A、They don't need their owners’ attention.
B、They are emotionally attached to their owners.
C、They don't experience separation anxiety as dogs do.
D、They respond to their owners’ voices less than dogs do.