提问so it is often hard to tell whether they are boys or girls

提问so it is often hard to tell whether they are boys or girls so it is often difficult to tell whether they are boys or gi so it is often h___to toll whether they are boys or girls 英语翻译it is often hard to say goodbye to a friend or to see th Boys and girls,it is time____ class.A.to B. 1.Mary of have long hair. 2.so it is hard to tell whetther t Is Lauren a boys or girls name,or could it be used for both? 名词前何时加theHowever,it is open to question whether they are put However,it is open to question whether they are putting all so such的区别例：they are _____ wonderful books that it's hard to Whether there is pure friendship between boys and girls? why it is so hard to do