来自计晨的问题
youhavedropped_"s''intheworld"nesscessary".
youhavedropped_"s''intheworld"nesscessary".


youhavedropped_"s''intheworld"nesscessary".
youhavedropped_"s''intheworld"nesscessary".
填an,因为s这个字母是元音音素开头,它的音标是es,是“e”开头,所以用an.在“necessary”这个单词里你拼漏了s这个字母.