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Dear Tony,
It’s great to 1．（告诉）you something about my holiday. I went to Sanya on holiday with my parents during the last 2．（冬天）holiday. We 3．（去）there by plane. It was my first time to 4．（乘坐）a plane, so I was very 5．（激动）. It was really 6．（温暖） and sunny there. I went to the beach and 7．（躺）on the sand to enjoy the bright sunshine. I 8．（游泳） in the sea, too. We had a great 9．（时间）there.
How was your holiday? I’m looking forward to 10．（知道）about it.
Yours,
David
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
