（）位于排列右边的叫（）放炮观测系统.
参考答案：炮点；大号.
简述直道途中跑的教学方法？
— What kind of volunteer work would you like to do?
— I'd like to _____ sick kids in hospital. [ ]
A. find out
B. look up
C. cheer up
D. hand out
