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You’d better be careful on April 1st, otherwise someone might make a fool of you! April 1st is April Fool’s Day, and on that day people like to play tricks on people.
April Fool’s Day is a very old holiday from Europe. It started over 800 years ago when people would put a picture or a fish on someone’s back as a joke. Now, people in Europe and North America play tricks and make fun of each other on April Fool’s Day.
Remember to be careful this April, and watch out for people playing tricks or you could be an April Fool!
1．April Fool’s Day is in April.
2．April Fool’s Day is from America.
3．People like to play tricks on people on April 1st.
4．April Fool’s Day started over 800 years ago.
5．You needn’t be careful on April Fool’s Day.
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
