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A．Can you tell me something about it？
B．Have you sent books to them？
C．I helped them with their lessons．
D．She raised some money for them．
E．Is it your first time to join in such activities？
F．It was a wonderful experience!
G．What about you？
A：Hello，Li Ming．What’s your plan for this summer holiday？
B：I have no idea．1．
A：I’ll take part in a social activity with my sister．
B：It sounds exciting．2．
A：No．I have been a volunteer in a poor village．The children there don’t have money to buy books．
B：3．
A：Yes．I bought them 30 books with my pocket money．
B：What else did you do there？
A：4．And now we are good friends．
B：Wow!5．I’d like to join you．
A：Great!I’m sure we’ll have a meaningful holiday．
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
