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1. Students _______ (work) hard at school.
2. _______ (play) basketball is exercise.
3. I go to Xi’an _______ (two) a year.
4. We _______ (yell) for him yesterday.
5. My mother _______ (leave) for the U. S. tomorrow.
6. He _______ (say) hello to his teacher.
7. I _______ (swim) in the sea tomorrow evening.
8. He said his friend _______ (is) very clever.
9. They are _______ (get) ready to have English class.
10. She wanted to _______ (fly) home.
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
