单项选择题

30()

A．breaking up
B．holding up
C．folding up
D．stopping up

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单项选择题

22()

A．pleased
B．excited
C．delighted
D．puzzled

单项选择题

In the writer's opinion, humans are the sharks' worst enemies because()

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