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（1）Those ducklings are cute.(改为感叹句)
________ cute those ducklings ________！
（2）Can birds fly? (改为肯定句)
________ ________ fly.
（3）This is a kangaroo.(改为复数句)
________ are ________．
（4）Are they sheep? (作否定回答)
________，they ________．
（5）Those are tigers.(改为单数句)
________ ________ ________ tiger.
（6）They are dogs.(改为一般疑问句)
________ ________ dogs?
（7）Those are goats．(就画线部分提问)
________ are those?
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
