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One summer holiday, I was in the forest by myself. I went down to fish in the river. Soon I got a big fish. Then I heard a great noise. There, right behind me, sat a big black bear! Wild animals are afraid of any quick move. So I moved very slowly. The bear watched me. But he sat still. I took the fish and threw it to him. He ate it at once. Now what was I going to do? I’d better go on fishing. Soon I got another fish. I went over to him and put the fish into his big red mouth.
I fished and fished—all for him. At first I afraid to stop. Then I began to like doing it. He was so friendly. When evening came, the bear stood up and turned away from me.
1．One summer holiday I was in the forest with my brother.2．There was a black bear behind me!
3．Wild animals are afraid of any noise.
4．I went over to the bear and put the fish into his big red mouth.
5．The bear stood up and turned away from me when evening came.
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
