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（____） (1) How many pens are there in the bag?
A．They are peaches.
（____） (2) What are these?
B．Thirteen pens.
（____） (3) Let’s go to the farm.
C．It’s three.
（____） (4) What’s the time?
D．I’ll go to the zoo.
（____） (5) Is he a naughty child?
E．I’m washing apples.
（____） (6) What are you doing?
F．OK.
（____） (7) What will you do this weekend?
G．Yes, he is.
（____） (8) Will she pick lots of apples? H. No, she won’t.
（____） (9) What’s thirty plus twenty? I. Yes, they will.
（____） (10) Will they come and have breakfast? J. It’s fifty.
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
