根据句子意思,用括号内所给单词的适当形式填空。 小题1:The plane hasn’t arrived yet. Do you know the time of its_____ (arrive)? 小题2:Mr. Sun felt cold and _________ ( frighten). 小题3:_________(luck), I got full marks in the last exam. 小题4:You needn’t take a notebook with you if you find it __________ (necessary). 小题5:Many people don’t know the _________ (important) of the wetlands. |