来某个时间之前已经完成的动作，故用将来完成时态。]

12．________，I have to put it away and focus my attention on study this week.

A．However the story is amusing

B．No matter amusing the story is

C．However amusing the story is

D．No matter how the story is amusing

答案　C　[从句子的结构看，这里表示的是让步关系，no matter how或however应位于amusing之前，故选C。]

13．The production plan was fulfilled ________.

A．head of time B．before time

C．ahead of time D．time ahead

答案　C　[句意"生产计划提前完成了"。表示"时间提前"应使用ahead of time，它常在句中作状语。而head是名词，before time是汉语中的说法，故C为正确答案。]

14．Mr Smith，______of the ______speech，started to read a novel.

A．tired；boring B．tiring；bored

C．tired；boring D．tiring；boring

答案　A　[形容词短语修饰主语Mr Smith，故使用tired；修饰名词speech，应选boring，因此A为正确答案。句意：由于讨厌这令人厌烦的演讲，史密斯先生开始阅读一本小说了。]

15．-Could you meet me at the airport?

-I'd like to，but I ________Shanghai when you return.

A．will have left B．was leaving

C．will leave D．have left

答案　A　[由句意可知，表示将要完成的动作，故A为正确答案。]

Ⅱ.阅读理解

　　Farming is moving indoors，where the sun never shines，where rainfall is irrelevant and where the climate is always right.The perfect crop field could be inside a windowless building with controlled light，temperature，wetness，air quality and nutrition.It could be in a New York high­rise or a sprawling complex in the Saudi desert.It may be an answer to the world's food problems.

The world already is having trouble feeding itself.Half the people on Earth live in cities，and nearly half of those－ about 3 billion－are hungry or ill­fed.Foodprices，currently increasing，are buffeted by dryness，floods and the cost of energy required to plant，harvestand transport.And prices will only get more unstable.Climate change makes long­term