Don’t worry too much about mistakes. They are _ natural part of learning.
The happy _______ of children playing in the garden disappears, and it is quite again.
As is known to all, ______People’s Republic of China is _____ biggest developing country in the world.
The small town is so good a place _____ many people come to visit ____ it has become well known all over the world.
Mr. White , many customers want to see you._______ they wait here or outside?
Though great efforts have been on their study , Annie still can’t make any improvements , which makes her parents greatly ______ .