Unit 2重难点解析
1. Although he is one of China’s most famous scientists, Yuan Longping works the land to do his research. (Reading)
此句中work为及物动词，意为“耕种（土地）”。如：
They are working the land together.　
他们一起在田间耕作。
work作及物动词，还有“使工作；开动；创造（奇迹）；经营（工厂、农场等）”等意；作不及物动词，意为“工作；（机器等）开动；（办法、计划等）行得通”等。如：
He works his employees long hours.　
他使他的员工长时间地工作。
Do you know how to work this machine?　
你知道怎样开动这台机器吗？
This shows that man can work wonders.　
这说明人类可以创造奇迹。
I don’t think that your suggestion will work.　
我认为你的建议行不通。
2. So he gives millions of yuan to equip others for their research in agriculture. (Reading)
equip为及物动词，在此作“使有能力；使有资格；赋予”解。该词本意为“装备；配备”，后接宾语+介词for或with短语。如：
We must equip the army for the modern war.
我们必须装备军队打现代化战争。
Our library is well equipped with modern facilities.
我们的图书馆装备着现代化的设施。
A college degree made him well equipped for teaching.
大学文凭使他完全有资格任教。
Your training will equip you for your future job.
你受过的训练将能够使你胜任将来的工作。
3. Now Dr Yuan has another dream: to export his rice so that it can be grown all over the world. (Reading)
此句中another作形容词，指不定范围的“另一个的，又一”，后加单数可数名词；但若another后跟few或数词时，则与复数名词连用。another也可作代词，表示“另一个”。如：
There’s another thing I want to tell you.
我还有一件事想告诉你。
There’s room for another few people in the back of the bus.
公共汽车后面还能坐下几个人。
I don’t like this one; please show me another.　
我不喜欢这个，请另拿一个给我看看。
4. When farmers use this kind of natural fertilizer they keep the air, soil and water as well as the food supply free from chemicals.  (Using Language)
free from意为“没有；不受……损害的”。如：
a city free from thieves
无贼的城市     
a day free from wind
无风的一天
You are free from blame.
你没有过错。
I am free from care.
我没有烦恼。
This house is free from flies.  这个房子没有苍蝇。

点击-ing形式作宾语

1. It’s hard to imagine ______ anywhere else but here.
A. live                    B. to live
C. living             D. to living
此题选C。英语中，有些动词（短语）一般跟-ing形式作宾语，而不用不定式作宾语。这类动词（短语）包括：advise, allow, avoid, consider(考虑), enjoy, escape, finish, imagine, mind, miss, practise, risk, suggest , feel like, insist on 等。
2. Having been ill in bed for nearly a month, he had a hard time ______ the exam.
A. pass                 B. to pass         
C. passed            D. passing
此题选D。have a hard time (in) doing意为“费了很大劲做”，-ing形式作介词的宾语。此句中省略了介词in，增加了试题的难度。类似的结构还有：
spend ... (in) doing花费……做
have difficulty / trouble (in) doing       做……有困难
stop / prevent ... (from) doing阻止……做
waste time (in) doing浪费时间做
excuse ... (for) doing原谅……做
be busy (in) doing 忙于做
3. She looks forward every spring to _____ the flower-lined garden.
A. visit            B. paying a visit
C. walk in           D. walking in
此题选D。许多含有to 的短语动词中的to为介词，其后若跟动词，应用其-ing形式作宾语。这类短语有：look forward to,  be (get) used  to（习惯于）, devote ... to ...,  lead to,  pay attention to, prefer ... to ... ,  stick to 等。
4. —The light in the office is still on.
—Oh, I forgot ____.
A. turning it off             B. turn it off
C. to turn it off      D. having turned it off
此题选C。有些动词既可跟-ing形式也可跟不定式作宾语，但含义不同。如：
（1）forget , remember 后跟-ing形式表示已发生的动作，跟不定式表示未发生的动作。
（2）try to do 尽力做； try doing 试着做
（3）go on to do  接着做（另一件事）；
go on doing  继续做（原来在做的事）
（4）mean to do  打算做；
mean doing 意味着
（5）can’t help to do 不能帮助做；
can’t help doing 禁不住做
（6）stop to do 停下来去做；
stop doing停止做
5. —What do you think of the book?
—Oh, excellent. It’ s worth ______ a second time.
A. to read                 B. to be read
C. reading                 D. being read
此题选C。be worth后常跟-ing形式的主动式作宾语，表示被动意义。
6. This sentence needs ______.
A. a improvement  
B. improve      
C. improving           
D. improved
此题选C。need后常跟-ing形式的主动式或不定式的被动式，表示被动意义。该句相当于This sentence needs to be improved.