(1)Let’s_______ (throw) away the old newspapers
(2)Thirty years ago when Tom _______ (be) a soldier, he ______ (fly) a plane and________(fight) for his country.
(3)She always _______ (clean) her car in the evening.
(4)What _____(be) you doing now? I’m _________(look) for an umbrella.
(5)Do you like _________(swim), Leo? Yes, I do.
(6)Peter usually_______(have) piano lessons after school.
(7)Shall we______(put) up more posters?
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