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There are two pictures about our city. One is now, the other one is before(以前的). Look! There was a small park, but now there is a big and beautiful park. And there is a lake with some ducks on it. There wasn't a lake before. In our city there were some old houses, small trees. But now, there are some new and high buildings. The trees are very tall and the flowers are very beautiful. There are some supermarkets and some cars now. I love my city. Do you want to visit here?
1．There was a park in our city before.2．There was a lake in the park.
3．There aren't some ducks on the lake now.
4．There weren't any tall trees before.
5．There are some supermarkets and some cars now.
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
