单项选择题
A．humans' friends B．man's enemies C．the world's largest fish D．not the same as other fish
A．more than one million sharks are killed by humans every year B．there are fewer than one hundred shark attacks on humans in the world each year C．many people are afraid of sharks D．most sharks eat fish and seals and other sharks
A．on the radio B．from the manager C．at the supermarket D．from their friends