【正文】
。t know what to do this afternoon. — ________(加入) us to play basketball. Join。t 是不必的 : Whose pen is this? _______________________________ Who does this pen belong to?或者 Whose is this pen? : is her favorite writer. _________________________________ She likes the writer best或者 Her favorite writer is 4.— What39。注意 mustn39。t。t。t。t 39。attend ( B )4.— The boy must be Li Wen. — I think it__________ .Li Wen is ill at home. 39。take part in 。t ____the meeting and she won39。t remember! I attended a concert yesterday so it might still be in th