The heavy snow lasted for a week, _____ serious traffic confusion in the whole area.

A．causing                               B．caused

C．having caused                          D．being caused

Barcodes(条形码) aren’t given much thought by the majority of consumers, but these codes were fairly recently applied in a working fashion in 1970.
A small food store owner decided one day that keeping records of the inventory(存货) of his stock and the associated prices were an extremely laborious process, and so, in 1948, he contacted The Drexel Institute of Technology in a bid to work towards a solution. Bernard Sliver rose to the challenge and set out to study the problem and began working on a solution involving an automatic way of keeping track of items that had been sold. Sliver and a group of students from the institute realized their answer in the form of ultraviolet light (紫外线), ink and a scanner.
The system worked initially, but possessed some negatives. It was incredibly costly to carry out on a large scale and the system was also unstable. If the invention was to become commonplace（寻常的事）in grocery stores, these two problems had to be solved.
The patent (专利) for the bar code system was filed by Sliver and one of his students, Woodland. The patent was not granted immediately; in fact, it took three years for the patent agency to grant their invention patent for the barcode, occurring on 7^th October, 1952.
Despite the patent being issued, the system was still not welcomed by the majority of store owners. It was not until 1966 that the system began moving its way into more and more grocery stores. This system was soon criticized, as there was no central mechanism for controlling uniformly（统一地）coded items. In 1970, Logicom developed the Universal Grocery Products Identification code( UGOIC), soon shortened to Universal Identification Number (UPC). It was Marsh’s superstore, in Troy, which was the very first store to install this complex barcode reading system, and its popularity has soared(升温) ever since, and is obviously now commonplace in all types of stores worldwide.
【小题1】What is stressed in the second paragraph?

—Where have you been?

—I was stuck in the heavy traffic. Otherwise I ____here earlier.

A car accident happened on the highway because of the heavy fog, but

　　　 no one got seriously injured.

A．sadly             B．luckily            C．hopefully          D．unfortunately

文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加，删除或修改。增加：在缺词处加一个漏字符号（^），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：在错的词下划一横线，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。
Last weekend we went mountain-climbing．Even the heavy rain in the morning could
not prevent us go．Setting off very early, we went along an extreme narrow road, all in
high spirits．On every side of the road were green fields and some farm house．We could
hear the sound of the rain and our footsteps mixing with our laughter．At noon we
reached top of the mountain．That surprised us most was the beauty of the scenes
there．After having a short rest and sharing with the food we had brought, we started
going down．It rained even harder．We are wet to the skin, and we still sang and
laughed happily．