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| 1. | A. The old man is playing chess. |  |
| B. The old man is listening to the music. | ||
| C. The old man is drawing a picture. | ||
| 2. | A. Look, the boy is skipping. |  |
| B. Look, the boy is playing basketball. | ||
| C. Look, the boy is doing the long jump. | ||
| 3. | A. They are singing well. |  |
| B. They are swimming well. | ||
| C. They are jumping high | ||
| 4. | A. I usually do my homework at nine o’clock. |  |
| B. I usually do housework at eight o’clock. | ||
| C. I usually do my homework at eight o’clock. | ||
| 5. | A. She looks very young. |  |
| B. She looks very beautiful. | ||
| C. She looks very old. | ||
| 6. | A. The girl is cutting the birthday cake. |  |
| B. The girl is doing the long jump. | ||
| C. The girl is getting the baton. |
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
