1 . Schools across the US East Coast canceled outdoor activities, commercial airline traffic was slowed and millions of Americans were urged to stay indoors on Wednesday as smoke from Canadian wildfires drifted south, blanketing cities in thick and yellow smoke.

“It’s critical that Americans experiencing dangerous air pollution, especially those with health conditions, listen to local authorities to protect themselves and their families,” US President Joe Biden said.

New York’s world-famous skyline, usually visible for miles, disappeared because of the smoke, which some residents said made them feel unwell.

“It makes breathing difficult,” Mohammed Abass said as he walked down Broadway in Manhattan. “I’ve been scheduled for a road test for driving, for my driving license today, and it was canceled.”

“It looks like Mars out there,” said Fox Forecast Center meteorologist Brian Mastro just before 2 p.m.

New York Goveror Kathy Hochul called the situation an “emergency crisis,” noting that the air pollution index for parts of her state were eight times above normal.

In Bethesda, Maryland, a high school moved its graduation ceremony indoors, while a Brooklyn, New York, elementary school deferred its “Spring Fling” dance party. A school in Montelair, New Jersey, called off a fifth-grade trip to an amusement park.

The smoke was wafting (飘荡) over the US northern border from Canada, where hundreds of forest fires have burnt 9. 4 million acres and forced 120,000 people from their homes in an unusually early and intense start to Canada’s wildfire season.

Tyrone Sylvester, 66, playing chess outside in Manhattan’s Union Square us he has on most days for 30 years, but wearing a mask, said he had never seen the city’s air quality so bad. “When the sun looks like that,” he said, pointing at the smoky sky, “we know something’s wrong. This is what global warming looks like.”

Poor air quality is likely to continue into the weekend, with a developing storm system expected to shift the smoke westward across the Great Lakes and deeper south through the Ohio Valley and into the mid-Atlantic region, AccuWeather said.

1. What do we know about Mohammed Abass?

A．He took a test for driving.	B．He had no driving license.
C．He had some health conditions.	D．He stayed indoors as expected.

2. Which is closest in meaning to “deferred” in paragraph 7?

A．Put off.

B．Took over.

C．Came up with.

D．Did away with.

3. What does the eighth paragraph mainly talk about?

A．Canada’s poor management.	B．The areas affected by wildfires.
C．The cause of America’s smoke.	D．The consequences of air pollution.

4. What can be learned from the last two paragraphs?

A．New York City smoke situation is not uncomfortable.

B．A strong wind will probably relieve the poor air quality.

C．Citizens have found new ways to fight climate changes.

D．The city’s air pollution doesn’t relate to global warming.