是常用表达。]

6．in　[考查介词。in half意为"减半"。]

7．the　[考查冠词。根据语境可知，此处应该用定冠词the特指fact。]

8．responsible　[考查形容词。根据语境可知，此处指人们应该为树木的减少负责。be responsible for"对......负责"是固定搭配，故填responsible。]

9．extremely　[考查副词。根据句意及句子结构可知，空格处修饰形容词higher，应用副词形式。]

10．is needed/will be needed　[考查主谓一致、时态和语态。这项研究表明，如果要在世界范围内恢复健康的森林，那我们需要再做多少努力。主句主语effort与need之间是被动关系，故用被动语态。"how much more effort"的谓语应用单数，故应填is needed。此处也可理解为表示将来要发生的动作，故主句可用一般将来时。]

（三）

(2017·宁夏银川高三检测)From Monday to Friday，most people are busy working or studying，but in the evenings and on weekends they are free to relax and enjoy 1.________ (they)．Some watch TV 2.________ go to the cinema.Others take part in sports.There are many different ways 3.________ (spend) their spare time.

Almost everyone has some kind of hobby.It may be anything from collecting stamps to 4.________ (make) model airplanes.Some hobbies are expensive，while others don't cost anything at all.Some 5.________(collect) are worth a lot of money.Others are valuable only to the owners.

I know 6.________ man who has a coin collection worth $250.He was very happy about his purchase and 7.________ (think) the price was reasonable.Besides，my youngest brother collects matchboxes.He has almost 600 of them but I doubt if they are worth any money.However，to my brother they are 8.________ (extreme) valuable.Nothing makes him 9.________ (happy) than to find a new matchbox for his collections.

This is what a hobby means，I guess.It is something we like to do in our spare time simply 10.________ fun.The value in dollars is not important.We do it for the pleasure it gives.

【语篇解读】　本文主要讨论了人们的业余爱好及其意义。

1．themselves　[考查代词。由上文的they可知，此处应填反身代词themselves作宾语。]

2．or　[考查连词。根据语境可知，此处表示选择关系，故用连词or。]