介绍： 1.
A). The Angeles National Forest.
B). The fire fighting in Los Angeles.
C). The tools used in fire fighting.
D). The protection of Mount Wilson.
2.
A). Tractors and hand tools.
B). Helicopters and airplanes.
C). The slightly higher humidity.
D). The 20-kilometer fire lines.

1. What is this news report mai...

介绍： 1.
A). The Angeles National Forest.
B). The fire fighting in Los Angeles.
C). The tools used in fire fighting.
D). The protection of Mount Wilson.
2.
A). Tractors and hand tools.
B). Helicopters and airplanes.
C). The slightly higher humidity.
D). The 20-kilometer fire lines.

1. What is this news report mainly about?
A). The Angeles National Forest.
B). The firefighting in Los Angeles.
C). The tools used in fire fighting.
D). The protection of Mount Wilson.

2.What helped the firefighters as they worked?
A). Tractors and hand tools.
B). Helicopters and airplanes.
C). The slightlyhigher humidity.
D). The 20-kilometer fire lines.

The largest fire has burned about 500 square kilometers of the Angeles National Forest, north of Los Angeles. Some 3600 firefighters are attacking（进攻，侵袭） the flames（火焰） in steep（陡峭的） terrain（地形）, using bulldozers（推土机）, tractors（拖拉机） and hand tools. They are also setting backfires（回火，逆火） to clear away dry brush（树丛）, and using helicopters（直升机） and airplanes to drop water and fire retardant（阻燃剂）. They got some help on Tuesday from slightly higher humidity（湿度，潮湿） as they worked to protect homes in hillside communities（社区）. Officials say they have carved（切碎，雕刻） out nearly 20 kilometers of fire lines to slow the advance（进程） of the flames. Firefighters are working to protect communication and scientific facilities（设备） on Mount Wilson, which overlooks（俯视，远眺） downtown Los Angeles. The site（地址） is home to transmitters（发射器） for most of the city’s television stations, as well as some radio stations, several mobile phone companies and police communication systems.

答案：BC