7 . 听下面一段独白，回答以下小题。
1. What is the purpose of the speaker?

A．To forecast the weather.

B．To keep people informed.

C．To make an advertisement.

2. What causes flights to South America risky?

A．A terrible storm.

B．Heavy air traffic.

C．Mechanical problems.

3. What will the air companies do for passengers if the flights are canceled?

A．Allow them to change flight routes.

B．Offer them free hotels.

C．Return all their money.

4. Which place is included in the no-go list?

A．Cairo.

B．Panama.

C．Buenos Aires.

9 . Getting Around Washington, DC by Public Transportation

Washington, DC, is not an easy city to drive in. If you’d rather avoid the headache of driving, consider taking advantage of the city’s public transportation system during your visit.

Public transportation

When Washingtonians say “Metro” or “Metrorail”, they mean the subway. The bus system is called Metrobus, and is usually simply referred to as the bus. Six rail lines (Red, Yellow, Blue, Silver, Green, and Orange) and an extensive bus system (more than 15,000 stops on 400 routes) connect DC to Maryland and Virginia.

Rail station entrances are marked with towers topped with the letter“M”. Stripes (线条)of color indicate, the lines traveling down below. Each, train, displays the name of its farthest destination.

Operating hours

Metro Operating Hours

DAY	TIME
Monday-Thursday	5 am-12 am
Friday	5 am-1 am
Saturday	7 am-1 am
Sunday	7 am-12 am

Metrobus schedules vary by route. Free transfers (转乘) to use within two hours are available, and they are accepted on most local buses in addition to Metrobuses.

Fares

Metrorail fares run $1.35 to $3.90 based on distance traveled. A $6.50 One Day Pass is valid (有效的) for unlimited Metrorail travel on weekdays after 9:30 am or all day Saturdays or Sundays. Bus fares are $1.25, and 60 cents for seniors and people with disabilities, and $3 for express buses. The DC Circulator primarily serves visitors. This bus service connects major tourist attractions and parts of town. Each ride is $1.

1. What does a color represent in the DC Metro?

A．A rail line.

B．The subway.

C．A rail station.

D．A day of the week.

2. What are the Metro schedules set based on?

A．Weekdays and weekends.	B．Distances and departure times.
C．Starting points and destinations.	D．Fares and the number of passengers.

3. When can One Day Pass be used on Metrorail lines on Sundays?

A．From 5 am to 12 am.	B．From 7 am to 12 am.
C．From 9:30 am to 1 am.	D．From 5 am to 1 am.