①图a是必需品曲线，需求量随收入增加而缓慢增加

②图b是奢侈品曲线，需求量增长幅度随收入增加而加快

③图c是奢侈品曲线，需求量随收入增长而逐步放缓

④图d是必需品曲线，需求量随收入增加而较快增加

A．①② B．③④ C．①③ D．②④

A. flexible B. convenient

C. specific D. considerate

---You are always working. Come on, let’s go shopping.

--- you ever want to do is going shopping. (2012 .北京）

A. Anything

B. Something

C．A1l

D．That

A. as B. why C. when D. where

A. that B. as C. which D. when

A. who B. when C. which D. where

A. survey B. convey

C. deliver D. inform

Is this the reason at the meeting for his carelessness in his work? (2012．上海)

A. he explained

B. who explained

C. how he explained

D. why he explained

---Can I come and have a look at your new house?

---Yes, ！(2011 .浙江)

A. with pleasure

B. I like it

C. I quite agree

D. by all means

--- We consider Tom it.

A. to clean

B. cleaning

C. to have cleaned

D. to have been cleaning