1．How many causes of tsunamis are mentioned in the text?

　　A．One. B．Two.

　　C．Three. D．Four.

　　解析：选B　细节理解题。由第四段可知，海啸通常是由地震或火山爆发引起的。

　　2．In the Tohoku earthquake over 15,000 people died mainly because of .

　　A．the earthquake itself

　　B．the lack of warning systems

　　C．the tsunami caused by the earthquake

　　D．the nuclear accidents caused by the tsunami

　　解析：选C　细节理解题。根据倒数第二段"...a tsunami that was a major factor in the death of over 15,000 people."可知，在2011年日本大地震中，海啸是造成超过15 000人死亡的主要原因。故C项正确。

　　3．Which of the following is TRUE according to the passage?

　　A．Over 200,000 people were killed in 12 countries because of the earthquake in Dec.2004.

　　B．Sometimes tsunamis are said as tidal waves, because they are related to tides.

　　C．The warning systems in some regions help people move to a safe place.

　　D．If you see water move to the coast, there will be a tsunami on the way.

　　解析：选C　细节理解题。从文章第六段可以看出C项正确。由倒数第三段可以看出是由于地震引起的海啸使20多万人丧生，而非地震本身，A项错误。B项与第三段意思相反，故为错误选项。文章第五段提到，海啸来时海水会从海岸向后退，而非向前进，故D项错误。

　　4．The text is developed mainly by .

　　A．listing some facts

　　B．giving some examples

　　C．providing some numbers

　　D．making some comparisons

　　解析：选A　写作手法题。本文主要列举了一些关于海啸的基本常识和事实。故A项正确。

Unit 5 The power of nature 单元加餐练（二） 主观题规范增分练

Ⅰ.语法填空