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（1）The children ______ playing in the park.
（2）Lingling _______ sitting on a swing.
（3）There is an old man ______ the park.
（4）He is sitting _______ a bench.
（5）His dog is looking ________ the children.
（6）It _______ raining heavily.
（7）Lingling and Dongdong ________ playing in the living room.
（8）Mrs. Chen is talking softly _______ her friend on the phone.
（9）We shall play quietly ________ the bedroom.
（10）We shall not jump ________ the bed.
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
