1. All Y chromosomes in existence today are descended from a single ancestor’s who is thought to have lived about 140,000 years ago.

A.      a single ancestor’s who is thought to have lived

B.      a single ancestor’s who was thought to live

C.      a single ancestor whom it is thought had lived

D.      the Y chromosome of a single ancestor who is thought to have lived

E.       the Y chromosome of a single ancestor whom it was thought had lived

2. 题干： Pending approval by the united states congress.bla, bla...., the airline said, on January, the growth rate of sth  will be increased..  (整句划线，选项不太记得了）

3. not only, but aslo,

CR:
1. 很多EVALUATION题。（本来这块就差，题干都超长，动不动就搞出五六行，严重走神ING，记不得了，SORRY)

MATH:
遇到7～8道JJ，我数学很差，这次多亏有它也到了50.。在此鞠躬大谢这个月无私奉献汇编JJ的XDJMs.
注意：有一些题有变体：做题时小心。
补充2道：
1，7^(4k+3)×6除以10的remainder是多少？
2，某公司一批货，A的货存量比B的货存量的多20%，同时比C的货存量少20%，问C占总货存量的百分之几？

JJ题：
22.  一个大圆里面切了一个小圆，说小圆的outside diameter is equal to inside radius of the large circular. And the cross-section area of the large circular is 49pai, what is the cross-section area of the small circular? （数字不是49PAI, 原体为14PAI)
18.    (PS) 一道路程，跑步的10mile/hr,走路的6mile/hr, 跑步的超过走路的10分钟后到达喷泉，走路的还要多久到？答案： 6又三分之二（即20/3)分钟

A. the only positive factor greater than sqrt(p) is p.

B. the only positive factor less than sqrt(p) is 1.

61.  .hexagon 的each edge is 80, what is the diagonal? (考试时：80改为20）

268. 1. 一个衣柜里有a, b, c三种衣服，c的数量>7，这三种衣服之比是9：4：5，问题是这个衣柜里共有多少衣服

（1）衣服总数less than 30

 (2)  a 和b一共是26

（D)

267. PS：一个苹果派要三杯剥皮、去核的苹果。剥皮、去核的苹果会比原来轻1/5。两杯剥皮、去核的苹果重1pound。1pound苹果值$1。问做p个pie要多少钱。15P/8

233. 40个人，60%的人参加A 30%的人参加B， 问既a又b的多少，

1）一共35（不确定，但不是40）个人参加了ab，改为：只参加B而没有参加A的人数是4人。

2）有5个没参加AB