Parents now believe that there are obvious differences in their approach to educating children compared with _____ of their parents.   

______ parents say and do had a lifelong effect on their children.

Someone knocked at your door just now,but I didn’t see who     was.

I visite Zhangjiajie during the summer vacation .It’s a pleasant trip, ____I’ll never forget. 

Australia is such a splendid country that we’ve decided to stay for ______ two weeks.