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| A. Changes in the city B. Changes in the family C. Changes about me D. Changes in shopping E. Changes in school |
1．
Before, I was a quiet boy. Now I'm active. I have many friends. Before, I couldn't go cycling, I practiced every day. Now I can ride a bike very well.
2．
Before, the air in our city was not clean. And the sky was not always blue. We couldn't see the stars at night. But now we plant many trees. Our city becomes more and more beautiful.
3．
Before. we didn't have Robin. Now I stay with him every day. He can help me do many things. Now I have another family member, Max. Before. he was small. Now he is bigger. He runs after me every day. I love him.
4．
Before, there was no gym in my school. We couldn't run or jump during the rainy days. Now we have a big one.We can play sports in it. Before, there was no dining hall, either. We ate lunch in the classroom. Now we have a nice one. I like it very much.
5．
Before, we had to go to the shops or supermarket to buy things. Now we can buy clothes, food, toys and so on, almost everything online. Before, we had to take cashes for shopping. Now we just need to take a smart phone. It' s very convenient.
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
