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Ⅴ. Read and finish the tasks.(10分)
Why do sandstorms（沙尘暴）happen（发生）? A sandstorm is bad weather with strong winds and lots of sand. It starts in dry places like deserts. The ground is dry and there are no plants to hold the dirt（尘土）. Strong winds blow sand and dust into the air. That's how a sandstorm begins.
1.
When it comes, the sky turns yellow or brown. The wind blows hard and sand flies everywhere. It looks like a big sand cloud moving in the air. During a sandstorm, people should wear masks to keep sand out of their mouths and noses. Stay indoors and close all the windows and doors.
2.
Planting more trees can help. Trees hold the sand in place and help prevent sandstorms. Let's work together to protect our earth.
3.
Why do sandstorms（沙尘暴）happen（发生）? A sandstorm is bad weather with strong winds and lots of sand. It starts in dry places like deserts. The ground is dry and there are no plants to hold the dirt（尘土）. Strong winds blow sand and dust into the air. That's how a sandstorm begins.
1.
B
When it comes, the sky turns yellow or brown. The wind blows hard and sand flies everywhere. It looks like a big sand cloud moving in the air. During a sandstorm, people should wear masks to keep sand out of their mouths and noses. Stay indoors and close all the windows and doors.
2.
C
Planting more trees can help. Trees hold the sand in place and help prevent sandstorms. Let's work together to protect our earth.
3.
A
答案
Task 1. 1. B 2. C 3. A
