问题
选择题
_____ U2, the Irish rock band from Dublin perform a concert in Beijing, tell me in advance.
A．If
B．Shall
C．Should
D．Would
答案
答案：C
should意思是“万一”，表示可能性，通常用于条件句中。如果省略掉if，通常把should提前。此句可还原成If U2, the Irish rock band from Dublin performs...。