根据句意,写出括号内所给单词的适当形式。 小题1:Many of my friends were invited to the party last Sunday because of my _________ ( twenty ) birthday. 小题2:Boys, don’t touch the machines, or you may hurt _________ ( you ). 小题3:The International Union Against Cancer says about seven hundred million children _________ ( breath ) smoke-filled air. 小题4:I can’t understand his (silent) on such an important matter. |