问题补充:
----It’s traditional in China to firecrackers on Spring Festival.
----But the serious smog(雾霾)nowadays needs us to stop it.
A. give out
B. set off
C. put off
D. show off
答案:
A. give out
B. set off
C. put off
D. show off
解析:句意:春节放鞭炮是中国传统。但现在严重的雾霾需要我们阻止它。give out分发,赠送; set off出发; (使)开始; 引起; 点燃; put off推迟;show off使突出; 炫耀,卖弄。所以选B。