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（____） 1. Yesterday I (A) play (B )football (C) and( D) basketball.______
（____） 2. (A) Did Amy and Sam (B) helped (C) their (D) mother? ______
（____） 3. I (A) didn’t (B) watched (C) TV (D) yesterday. ______
（____）4. I (A) played (B) table tennis and she (C) plays (D) basketball yesterday. ______
（____） 5. (A) Do (B) you (C) help (D) your little sister yesterday? ______
（____）6. — (A) Did Xiaoyong and Xiaoming (B) laugh?--Yes, (C) he (D) did. ______
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
