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1.Tom and Mary ___________ (come) to China last month.
2.Mike _________________ (not go) to bed until 12 o’clock last night.
3.Mary __________ (read) English yesterday morning.
4.There _________ (be) no one here a moment ago.
5.I ___________ (call) Mike this morning.
6.I listened but ___________ (hear) nothing.
7.Tom ___________ (begin) to learn Chinese last year.
8.Last week we _________ (pick) many apples on the farm.
9.My mother ________________ (not do) housework yesterday.
10.She watches TV every evening. But she _______________ (not watch) TV last night.
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
