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( )（1）当你在电话中询问对方是谁时你应该说：
A．Who is it? B．Who are you? C．Who is that?
( )（2）当你打电话表示我是谁时你应该说：(以Tom为例)
A．I am Tom. B．This is Tom speaking. C．Tom speak.
( )（3）当你打电话请对方稍等一会儿时，你应该说：
A．Hold on，please. B．Wait a minute. C．Please stop.
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
