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Earth Hour is usually on the last Saturday of March. It's Earth Hour now. Many people turn off their lights. Alice usually watches TV with his parents in the evening, but now she is looking at stars. Kitty and Ben usually read storybooks before bedtime, but now they are lighting the candles. They are playing word games with their family. Sally usually does her homework at night, but now she is telling her sister a story. They feel proud to do something to save the Earth.
1．Both Kitty and Ben usually read storybooks before bedtime.2．Many people turn off their lights at Earth Hour.
3．Alice is playing word games with her family.
4．Sally is lighting the candles.
5．Earth Hour is usually on the last Saturday of May.
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
