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( )（1）Did you take Amy’s doll ?
( )（5）Did they come for the music competition ? E. No , I didn’t .
( )（6）When did you come back ? F. I played the flute .
( )（7）Where did you go last Saturday ? G. I fell off the tree.
( )（8）What did you do ? H. Yes , they did .
( )（9） What happened to you ? I. He fell over .
( )（10）What happened to the boy ? J. I went to the park .
| A．I lost my key ( )（2）What are you doing ? | B．Yes , I did . It isn’t here ()（3）Did you look for it in your bag ? | C．Yes , it is .()（4）Is this your hat ? | D．I came back last Wednesday |
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
