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1. Mary’s mother often _______( help) her with her math on weekends
2. Sometimes they _______(not have) lunch at home.
3. I _______(walk) in the park now.
4. Ben often _______(wash) his clothes on Sunday.
5. She _______(go) to bed at ten o’clock.
6. ______ (turn) on the light please.
7. Where ______ (be) the pictures?
8. The boys ________ (play) on the playground now.
9. My sister _______ (not have) a basketball.
10. January is the ______ (one) month.
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
