An Arctic front sweeping across the US is bringing misery to millions of Americans in the east and the south and causing temperatures to plunge.

In Chicago the temperature dropped to -8℉(-22℃), breaking a record low of -7℉(-21℃) in 1936. The wind-chill factor could make it feel as cold as -30℉(-34℃).

The cold affected millions of people from the Great Lakes to the southern Great Plains. Lake Erie was 90% covered in ice in the past few days, while Lake Ontario was more than 75% covered in ice.

The National Weather Service said temperatures in the mid-Atlantic states and Carolinas could reach lows not seen since the mid-1990s.

In Boston, a city that has seen some 8ft (2.5m) of snow over the past few weeks, Mayor Marty Walsh made an appeal to adults who have posted videos on social media jumping out of their windows onto the snow in their underwear. "I'm asking people to stop their nonsense right now. These are adults jumping out windows. It's a foolish thing to do, and you could kill yourself," Mr Walsh said. North Carolina Governor Pat McCrory has urged residents to stay off ice-covered roads.

At least six weather-related highway deaths were reported in Tennessee, Virginia and North Carolina.

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1.What is the lowest temperature in Chicago?

A -22℃

B -21℃

C -34℃

D -30℉

解析：选A。A 细节理解题。根据第二段In Chicago the temperature dropped to -8F (-22C),…可知，故选A。

2.In which part were Americans affected by cold?

A From the Great Lakes to the southern Great Plains.

B In the east and the north.

C In the west and the north.

D From the Great Lakes to the northern Great Plains.

解析：选A。A 细节理解题。根据第三段第一句The cold affected millions of people from the Great Lakes to the southern Great Plains.可知，故选A。

3.How thick is the snow in Boston?

A Less than an adult.

B Less than 2m.

C About an adult.

D Over an adult.

解析：选D。D 判断推理题。根据第五段第一句In Boston, a city that has seen some 8ft (2.5m) of snow…可推断知，故选D。

4.Which statement is RIGHT according to the passage?

A The cold brings joys more than misery to Americans.

B Americans welcome the snow because they can jump out their windows.

C People in Hawaii are also suffering from the cold.

D It may cause death to jump out of the windows with thick snow outside.

解析：选D。D 内容理解题。根据第五段第四句It's a foolish thing to do, and you could kill yourself.可知，故选D。

5.Which state is NOT mentioned of weather-related highway deaths?

A Tennessee.

B Virginia.

C South Carolina.

D North Carolina.

解析：选C。C 细节理解题。根据最后一段可知，故选C。