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（1）A. Is your mother washing dishes?
B. Is your mother watching television?
C. Is your mother washing shoes?
（2）A. The block's shadow is long.
B. The block's shadow isn't long.
C. The block's shadow is short.
（3）A. Don't eat chocolate here, Danny.
B. Don't eat sweet here ,Danny.
C. Don't eat biscuits here ,Danny.
（4）A. The colud were grey. Now they are white.
B. The sky was grey. Now it is white.
C. The clouds were white.Now they are grey.
（5）A. The monkey lives in the jungle.
B. The monkeys live in the jungle.
C. The monkey is playing in the jungle
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
