he sometimes wants to confuse the buyers
he knows from experience that certain people will want to buy certain items
he wants to keep certain people waiting
he wants to reduce the number of buyers
第1题：
Why did David decide to leave school and start working?
A. He received lots of job offers.B. He was eager to help his mother.
C. He lost interest in school studies. D. He wanted to earn his own living.
第2题：
Why did David decide to leave school and start working?
A．He received lots of job offers.
B．He was eager to help his mother.
C．He lost interest in school studies.
D．He wanted to earn his own living.
第3题：
A.No, you may not
B.No, you can not
C.No, you can’t
D.Please don’t
第4题：
A financial market may be thought of as ordinary market in which traders may buy or sell particular financial commodities.
A．Right
B．Wrong
C．Doesn't say
第5题：
A、carries out
B、carried out
C、was carried out
D、has carried out
第6题：
When Mr.Westhusin says “...cloning is dangerous,” he implies that .
［A］ lab technicians may be affected by chemicals
［B］ cats and dogs in the lab may die of diseases
［C］ experiments may waste lots of lives
［D］ cloned animals could outlive the natural ones
理解题。题干引用的话出现在第二段末。前一句话中威斯苏森先生提到在猫或牛的克隆试验中对动物卵的浪费以及许多动物的自然性流产，因此可知，［C］是“危险”的真正含义。其他项文中均未提及。
第7题：
A、should run
B、should have run
C、may run
D、may have run
第8题：
A.Whatever the shape of a body may be
B.The shape of a body may be whatever
C.May whatever the shape of a body be
D.Whatever may the shape of a body be
第9题：
A.to find out problems
B.to decide what to teach.
C.to assign students to different-level classes
D.to decide how to teach next
第10题：
Researchers cannot ( ) the possibility that Earth may one day run out of its orbit.
A. hand out
B. drop out
C. rule out
D. keep out