专四

单选题What is this passage mainly about?

A．Call on people to protect shark 
B．Point out the living environment of shark
C．Explain why the sharks are dangerou 
D．An introduction to shark

参考答案：D进入在线模考
主旨题。本文中谈到有350多种鲨鱼在海中生活了上百万年；他们靠嗅觉和电磁力量寻找猎物，并且可以吞食各种东西；他们像人类一样养育后代；鲨鱼的抵御疾病能力对人类有用。这些都是对鲨鱼的介绍，因而[D]为答案。

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1

One purpose of writing a letter of complaint to a vendor is to
[A]inform him that you find a problem． 
[B]accuse him of irresponsibility．
[C]accuse him of negligence． 
[D]tell him that his company is a total failure．

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2The preferred way of making a vendor answer your complaint is to

A．take legal action against him whenever possibl
B．make him feel shamefu
C．make him feel obliged and willing to do something for yo
D．ruin his company’s reputatio

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3A successful letter of complaint is one that the vendor．

A．persuades 
B．forgives 
C．condemns 
D．motivates

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