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It’s a sunny day today. Mr Smart and Ms Smart are working. Their children are playing in the park. Amy can jump far. So she is jumping. Sam can run fast. So Sam is running with Lucy. Tom is making a plane. Grandpa is listening to music. Grandma is feeding ducks on the lake. She is very happy. Look! A little dog is catching a bird. The bird can fly. But the dog can’t fly. It is very sad.
1．Sam is ________. ( )| A．riding a bike | B．playing | C．running |
| A．playing basketball | B．running | C．jumping |
| A．making a plane | B．rowing a boat | C．making a cake |
| A．flying | B．feeding some ducks | C．working |
| A．A little dog | B．The bird | C．The dog |
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
