增加：在缺词处加一个漏字符号（八），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1)．每处错误及其修改均仅限一词；

2)．只允许修改10处，多者（从第11处起）不计分。

    We are so happy to have Ms Green here to stay with us today. Now I'll make a brief introduce about her. During the period of 1990 and 1996, she studied at Chicago University in America, learn English and the Chinese language. After graduation, she comes to China and has been teaching English in middle schools.

    Ms Green will teach us English for a few year in our school. While stay here, she will help improve your spoken English. Beside, she will tell us more about the education in Canada.

    I hope Ms Green will have good time in our school.

某工厂去年生产某种产品一件，所获取的利润率为59%，今年由于物价上涨，工厂生产这种产品的成本增加了6%，而今年与去年该产品的出厂售价一样，所以今年该工厂生产该产品一件所获取的利润率为           .

文献与考古表明，唐代中后期，“波斯锦”“胡锦”“番锦”通过丝绸之路，不断输入中国，内地也生产“胡式锦”。这表明（    ）

在人的消化系统中，消化食物和吸收营养物质的主要器官是（    ）