2题prep题，搜索无果

40.     3636-!-item-!-187;#058&003488

Beth's bank charges a service fee on a regular checking account for each month in which the balance on the account falls below $100 at any time during the month.  Did the bank charge a service fee on Beth's regular checking account last month?

(1)  During last month, a total of $1,000 was withdrawn from Beth's regular checking account.

(2)  At the beginning of last month, Beth's regular checking account balance was $500.

C /E 正解

我觉得本来账户里有500，后来拿掉1000，那肯定这个balance是小于100，为什么不是选c呢？
                

(2)  The total of the prices for all the shirts that Mark purchased during the sale was $129.00.

E /C 正解

1. you assumed no savings during the month
2. 129/(21.5*1.5)  *2

第一题  谁告诉你后来拿走1000了 是不是看2的时候带着1看了

第二题 知道总价格 知道正常价格

那么 （总价-半价）/正常价格+1=衣服数量

40: begining balance and one withdrawal transaction do not necessaryly mean any possible time-spot balance during the month. You should ask somebody who major in accounting.

41: a pair of shirt price to one regular price and a half,therefore: 129=21.5*1.5*A(pairs).The result is that Mark purchase 4 pairs of shirts

he also purchased a shirt at half the regular price. 

请问 这个 到底是用半价买了一件衣服 还是一半的衣服用半价

好像我和LS的解答不太一样？

期待NN现身

the price of 1 t-shirt = 1/2 regular price