1. If you have been generous to a person for a period of time, it is most likely that the person will take advantage of your generosity and trade on your “weakness” become appreciative of your kindness.

　　A. but not B.let alone C. rather than D. instead of

　　2. A poet must not write for the ages past, but for in which he lives and those which are to follow.

　　A. one B. those C. the one D. that

　　3. There is a delicate balance of nature many square miles of ocean and vegetation and clean air are needed to maintain only a relatively few human beings.

　　A. where B. in which C. when D. how

　　4. There are cases new factories are being put up and beautiful old trees are going to be cut down for a new factory.

　　A. which B. where C. that D. when

　　5. Somebody in the next room must be ill, a doctor has just come out.

　　A. because B. for C. in that D. as

　　1. Crather than 表示對比，在意思上前后形成對照：take advantage of your generosity…rather than become appreciative of your kindness意為“利用你的慷慨，而不是理解你的好意”。另外，rather than在結(jié)構(gòu)上起并列作用，使take advantage與become appreciative平行。

　　2. Cthe one替代the age，還原為：…but must write for the age in which he lives and the ages which are to follow。

　　3. Bin which在定語從句中做狀語，相當(dāng)于in the balance of nature (many square miles of…)。

　　4. Cthat引導(dǎo)case的同位語從句，其他連接詞都不合適。

　　5. Bfor連接一個原因分句，對前面的推測做原因上的解釋。請考生記�。簾o論從邏輯推理還是從語法規(guī)則上看，只要前面是表示推測的句子，后面大都用for連接后一句，而不用其他連詞。